Betrayal of the space dragon

Far outside the Galactic Federation's influence, the vast majority of planets were unexplored, and even fewer had names. SV-101 was no exception to either of those; 98.7% of its surface was covered in water, and despite its breathable atmosphere, the only noticeable life that was present on it was plants and, currently, a group of visitors.
They certainly looked rather odd; all of them were bipedal with a reptilian appearance, though all but one lacked a tail. The only one to have one was markedly different from the others, a little over twice their height, with purple skin, and looking like a hybrid of a dragon and a pterodactyl, complete with wings. Any denizen of the galaxy would recognize the group immediately; they were Space Pirates, led by Ridley.
The 8 of them that had come down to the planet's surface had landed on an island in search of valuable materials they could harvest, and had found themselves quite the supply in a cave, enough that they and the majority of their faction would be set for a fairly long time. As his immediate followers rejoiced, Ridley smiled and stared into space, using an integrated communicator in his head to notify the rest of the crew, still in orbit. "Bring down the mothership and prepare the mining equipment. We've got quite the haul down here."
He looked to the Pirates accompanying him, knowing it would likely be a few minutes before he'd receive a response from above. "I've notified the rest of the crew. Have yourselves a break while the equipment gets here, if you wish." He turned to leave the cave, and-
"Sir?"
Ridley stopped and wordlessly looked back at the Pirate that had addressed him, who'd stepped forward from the others that were now looking at both of them.
"We were thinking... maybe we could take some time for a proper celebration? Just until we can get set up for the mining, obviously."
Looking over the hopeful faces of them all, Ridley thought about it. I suppose we did sort of overpack for this... Hate how wasteful this sort of thing is, but... Maybe just this once. "...No alcohol. Other than that, do as you please."
"Thank you, sir!"
He walked off without bothering to see their reactions, though could hear how happy they were. Once he was out of earshot, one of them - the leader of a secret subgroup of Space Pirates, which the others with him were also part of - grinned. "That's part 3 done. 1 or 2 more to go, and that menace is finally dealt with."

Back on the ship the Pirates had landed on the planet with, all but Ridley gathered up supplies for their little party to not seem suspicious, with Ridley himself having gone off on his own somewhere outside as he tended to do. Those that were at the ship discussed their plan and its reasoning one more time: When they'd first joined up with the Space Pirates, they knew little about its leader, but slowly learned just how truly horrible he was, even by the faction's standards. After the raid on the colony K2-L not too long ago, which left just one singular civilian alive, it became even more clear to the dissenters that something needed to be done. Having earned Ridley's trust by this point, they set about plotting what even the Federation couldn't manage; his death.
"We've got that, ah, "cocktail" for him, right?"
"Yeah. We had it the last 3 times you asked, too."
"Just gotta be sure! That thing's got enough sedative in it to kill someone, we can't afford to misplace it."
"Hopefully "someone" includes that monster that's supposed to be our leader."
"Relax, the hard part's done. We've convinced him to come to an ocean planet, rigged the ore scanners to say a small amount of ore was huge, and now it'll make sense when someone offers him a drink. If it doesn't kill him, we just haul his ass into an escape pod and fire him into the ocean, done and done."
"That's if he drinks it, you know he's not a fan of celebrations. If he doesn't, he'll eventually find out we messed with the scanners, and we're dead, so we need to get this right."
"I get the feeling he'll give it a shot if we pass it off as what we're having. Unless anyone has a better idea they want to just pull out without rehearsing?"
"..."
"Figured. Come on, let's get back out there. Even if this doesn't work out, we can at least enjoy ourselves."

Ridley sat by himself on the edge of a cliff overlooking the ship after a short flight, thinking about the K2-L raid. It had been disastrous on both sides, not just the humans'. The Pirates had been so close, then some random idiot ruined everything and nearly killed him... While he'd never admit it, Ridley admired that level of bravery. Another human there had been like that, too, sacrificing herself without hesitation when he was about to kill her daughter. He certainly wouldn't mind having people like them on his side, if they weren't symbols of his failure. What were their names? Something-Aran...
He jumped a bit as his communicator went off, getting a response from his crew. "Sorry about the wait, sir, we're having some technical difficulties. Shouldn't be much longer." Unbeknownst to him, that message had come from one of the dissenters, who hadn't actually relayed the original message yet. Ridley rolled his eyes, and looked down at the ship. Despite his distance from it, he could see the Pirates milling about, likely enjoying themselves. Since the wait was clearly going to be longer than he anticipated, he decided he may as well check in on them.
After getting up, Ridley spread his wings and jumped from the cliff, easily gliding down to the ship and landing next to it. "I imagine you're all enjoying yourselves."
"Of course! Thanks again for letting us do this, sir, we know you're not a fan of this sort of thing. We saved you a drink, too, if you want some." He held out the cup of sedatives to them.
Ridley hesitated for a moment. ...May as well, I suppose. He took the drink and knocked it back as if it were a shot, which at his size it essentially was. It had a sort of grape flavor, and was a bit bitter, though in a way he enjoyed. "Hm. Not bad. Thank you."
The pirate smiled at him, though secretly for a quite different reason than he was thinking. "Thank you, sir! It's my own idea!"
"I suppose, since I'm already here, I may as well stick around. Not a whole lot to do right now." Ridley handed back the cup and leaned against the side of the ship, watching his followers for a while.
About half a minute later, his head started feeling fuzzy. At first, he thought nothing of it; he wasn't sure he'd gotten enough sleep, so it was probably just the tiredness catching up to him. It was getting more intense, though... Eventually, Ridley was having trouble staying awake. This wasn't from lack of sleep; something was wrong. He had touched some odd-looking plants earlier, it must've been some kind of toxin from those.
Starting to actually get slightly nervous, he pushed off the hull and started stumbling his way to the ship's entrance, knowing there'd be antitoxin inside. As dizzy as he was getting, he could still tell his crew was concerned, and he tried to reassure them. "...I-I'll be ffine...d-don't touch any...um...any wweird plantss..." Ridley slumped against the outer airlock door and fumbled for the controls, but he could hardly even feel anything now... Before he could get the door opening, everything finally went black as the sedatives fully knocked him out.
As his unconscious body hit the ground, there were some happy yells from the crew. The leader of the dissenters got the airlock open, and started trying to drag Ridley inside. "That probably isn't going to kill him, you all know how tough he is. Help me haul his ass into one of the escape pods." It took the combined efforts of almost all of them, but they got Ridley moving, eventually getting him into a pod that had previously been sabotaged so its distress signal wouldn't trigger. The ship was already positioned to aim it at some random part of the ocean, so once he was the only one in there, the eject button was pressed, and the pod rocketed off.
Now, there was some cheering. "Great work, everyone! That's gonna be the last of him! Let's clear out of here, so if he doesn't end up drowning, he'll be stuck on this planet."
"That's if he even wakes up at all!"
The ship's engines were started up, and soon enough it lifted off, leaving behind the planet that would hopefully be Ridley's grave.

Hours later, Ridley stirred in the escape pod, which had long since landed somewhere. He was still having trouble fully waking up, but managed to slowly sit up. Of course thhey didn't help...nneed adrenaline at thhis point... Only vaguely aware of where he was, he blearily looked around before finding a medical kit on the wall and sluggishly reaching for it, falling over in the process but bringing the kit down with him. A bit more fumbling, and he got it open, grabbing an adrenaline injector and jamming it into his chest. In seconds, he shot back to full awareness, and he finally fully occurred to him where he was. I'm in an escape pod? The hell happened?
He tried to fully stand up, and hit his head on the roof. "Mmh... This isn't even mine..." The only escape pod that was big enough for Ridley was on the mothership, so he likely hadn't been brought back up there. Looking outside, it seemed he'd landed in a cave, and the way the pod had come was collapsed... Before going out, he checked the monitor to make sure the environment was safe. Temperature was a bit low, pressure was too high for most but still fine for him... Liquid environment? Ridley scowled. God damn it, I hate swimming... Hell with that, he could wait for rescue. 
Although, why was the distress signal off? He tried to turn it on, but nothing happened. The emitter of that was one of the most protected parts of these pods, it wouldn't have broken. After a brief search, he found the access panel for it and tore it open... There was nothing there. Someone had sabotaged this escape pod! That definitely meant his odds of contacting someone helpful with his communicator weren't very good, but going out into the water was the last thing he wanted to do. "Get down here and get me the hell out. I know you can trace this."
A response only took a few seconds this time. "Oh, you're alive. So, what's your plan? Gonna stay in there and starve, or swim out and drown?"
"Get your ASS down here!"
"...You know, I don't have to take this any more."
"What the hell do you mean by that!?"
...
"HEY!"
...
Ridley punched a wall in anger, denting it. His only option now was going outside and swimming to the surface. There were spacesuits in the pod, but none of them even came close to fitting him, so he'd have to hold his breath. Frustrated, he squeezed into the airlock, which was barely big enough for him, and after some hesitation, set it to cycle. The tiny (to him) room started quickly flooding, and he got a few deep breaths before holding one as the water reached the ceiling. Pressure built up to match what was outside, then the door opened.
Walking out onto the stone floor, bubbles trailed from Ridley's nostrils as he growled. Being underwater felt as awful as ever. As much as he hated water, he could at least swim, though not very well. For now, he'd walk, which was a little faster than he could swim and used less energy. Leaving the escape pod behind, Ridley progressed into the cave, knowing to take every left turn so his escape would be an eventuality, not an if. With his breath holding record being just over half an hour, he'd definitely be fine.
Minutes upon minutes passed, the only sounds being the occasional bubble as the space dragon firmly held his breath. He was thankful he hadn't encountered any hostile creatures yet; he was at a major disadvantage in underwater fights, unable to use his plasma breath. This wasn't entirely unpleasant though; Ridley enjoyed pushing himself, and holding his breath a long time was his favorite way. Having been going off a single breath for the past 5 minutes, feeling a slight need to breathe and knowing it'll likely be some time before he can do so... Despite the danger, he found himself starting to get aroused.
Over a couple more minutes of submerged walking, Ridley's cock slowly grew fully erect, eventually several feet in length. For the first time since he'd woken up, he smiled a little, deciding he may as well get some enjoyment out of the situation. Continuing to walk, he started masturbating, holding back a pleasured moan. It wouldn't do to lose air in here...
More time passed, Ridley eventually having been holding his breath nearly 15 minutes in this annoying cave. He was getting frustrated at being lost so long, a sentiment shared by his aching lungs. His cock, though, was quite enjoying this, getting close to an orgasm... Ridley stopped and began using both hands to masturbate. In just another 20 seconds, his arousal hit the point of no return, his masturbation speeding up some to make the impending climax even stronger.
After a few seconds of holding back, he let his orgasm properly start, shooting cum several feet ahead of him even with him being underwater. The intensity of the orgasm made him moan, before he clamped a hand around his muzzle to keep from losing more air as his cock continued pumping out cum. It took almost 10 seconds for his climax to begin slowing down, the repeated cumshots losing power, then finally stopping entirely. Ridley smiled, glad to get such an intense orgasm out of such an annoying situation, and resumed walking through the cave.
With there still being no way to tell how close he was to an exit, and another 10 minutes having passed, Ridley found himself getting the slightest bit nervous... Then quite angry. How dare a fluid scare him!? He'd been through far worse than just being underwater a long time, this was nothing, even with his lungs trying to convince him it was an issue. There was a burning in his chest by now and a blush on his face, and the space dragon finally puffed up his cheeks. Even as the danger grew, so too did his cock, fully erect again, but Ridley tried to keep it from distracting him this time.
Time felt like it was going by slower and slower, each heave of Ridley's chest forcing out a muffled grunt, sometimes bringing bubbles with it. 26 minutes, 27... His cheeks were beginning to slowly get bigger, and his blush turning a bit purple. 28... Frustrated at the growing frequency of his bubbles, Ridley grabbed his muzzle again to hold the air in, his body starting to subtly shiver from his lack of oxygen. 29... His cock was visibly throbbing, eager to unload for a second time on this dive, and his cheeks were half the size of his head.
30 minutes without breathing. Ridley's blush was blue, and for the first time since the K2-L raid, he was truly afraid. He'd experienced crushing, impalement, starvation... Drowning was one of the few painful things he'd never felt before, and he didn't know what to expect. Was it going to be even worse? With an embarrassing whine, he doubled over, fighting to keep holding his breath as his cheeks reach the size of his head.
His cock, with a raging erection that had been neglected for so long as Ridley's arousal grew and grew, decided to take the initiative. With even harder throbs, it began shooting a second load into the water, cumming hands-free from holding his breath for far too long. Each spurt forced stale bubbles from his lips, and Ridley finally couldn't take any more. For just a moment, his mouth opened to suck in, water rushing in and down his throat, making him cough up even more air and deflate his cheeks before he took a proper gasp, flooding his lungs!
With a pained, gurgling screech, Ridley clutched at his neck as he began to drown. He could now say for sure just how bad it was: Close to the worst he'd felt. After a brief bit of thrashing, he frantically tried to swim, not thinking about how that's a bit slower for him. Repeatedly inhaling water prolonged his orgasm, and he left a trail of cum behind him, another spurt following every watery gasp.
Ridley's orgasm continued for almost a minute straight, helping keep him a little distracted from the pain of his choking, but it did eventually stop. Gurgling and gagging, Ridley finally remembered he could swim-walk faster than he could swim, and dropped back to the cave's floor to do so. His face was entirely blue now, and with no bubbles left in him, each cough and gasp just moved water back and forth.
Several minutes after he'd run out of breath, Ridley finally found the cave's exit, getting out onto a sea floor. He'd somewhat calmed down by now, exhausted from the depleting oxygen in his body, but he still frantically looked around for anything that could help him surface... Letting out a waterlogged growl followed by a hiccup as he didn't find anything. With no other option, he tried to focus and swim up, his head starting to feel a bit fuzzy.
For minutes on end, Ridley swam, his gradually weakening body slowly turning a deeper purple than usual. Every few seconds or so he'd hiccup, drawing in a bit more water, but not to his lungs; each hiccup only pulled water into his stomach, and this instinct to suck in didn't care about his usual capacity, slowly bloating out his belly, adding more weight, making his ascent even slower.
After nearly 10 minutes of drowning, the water around Ridley started getting lighter as his blue and notably inflated body got closer to the surface. All the water in him, combined with how weak he'd become, slowed his ascent to a crawl... Until he began to slow, his eyes rolling back as he...
He refused to let this be how he died. Forcing himself back to awareness, Ridley's strength mostly returned as his swimming sped up again. Determined as he was, he didn't notice he'd gotten fully erect once again, and he if did he wouldn't have cared. Swimming frantically for another half minute, the surface at last came into view, but the space dragon's lack of oxygen was catching up to him again.
Ridley's swimming became sluggish again, losing coordination, and he soon started sinking while still swimming due to all the weight in his oversized gut. With his body having gone mostly numb, he just couldn't keep his eyes open any more, going limp as the surface rose back out of view...
...Rage filled him. This would be a pathetic way to die. No, he had to prove he was too powerful to be drowned, too powerful to be betrayed... He had to get revenge!
With his eyes shooting open one more time, Ridley let an aquatic roar loose into the ocean as he started furiously swimming again, this time using his wings to go faster. He knew he wouldn't wake up next time; there was no oxygen left in him. His body was entirely a deep blue, running off just adrenaline at this point. Uselessly panting in anger, Ridley got the surface in view again, getting closer and closer as he started slowing again... But just before he could break through, he stopped. Certainly not because he wanted to, but because there was nothing left. Adrenaline on its own wasn't enough any more, his depleted body going still, though Ridley remained conscious.
His anger giving way to terror, he tried his best to force himself to move, but it just wasn't happening. Even if he could, his belly almost being half his own size meant he'd hardly get anywhere. There was nothing he could do now... But he did at least have one thing going for him; his cock was heavily throbbing with his slowing heartbeat, and he soon came for a third time. Only a few shots of cum were sent out, running out of that as well, though his cock kept throbbing as if there was more.
Staring blearily up at the surface as everything faded away, Ridley clung to consciousness for a few more seconds, but his mind was empty, too weak to even think any more. Before long, even that faded to nothing, leaving the drowned space dragon sinking into the depths once again, eyes still open.
The galaxy's greatest threat was gone at last.