[Hypnosis]
Rainbow Dash: 
Do you have the Eye of Serpentis here or not?
Mysterious Zebra:
... Yes. In the back. Let me show you...
[Why does he have an erection?]
[HOW IS IT SO BIG?]
Mysterious Zebra:
Coming?
Rainbow Dash:
Heh. Yeah.
[Dash passes through the curtains. The zebra has a polished gold pocketwatch in front of him.]
[Will Save!]
[Quicksave]
[Crit Fail! Rainbow Dash has been hypnotized!]
Rainbow Dash:
Worth.
Mysterious Zebra:
Your first command, my dear, is to put this on. 
Rainbow Dash: 
Y e s   m a s t e r

Mysterious Zebra:
Now, open your mouth.
[Rainbow Dash opens her mouth.]
Mysterious Zebra:
Good. On your knees. Take as much of me as you can.
[Rainbow does as she is commanded. It's not much. The zebra is huge. Another artefact...?  She
 whines in disappointment. She must please her Master, but her mouth is not enough.]
[Rainbow forces her breasts into his cock, pumping them up and down to the rythmn of her mouth,
 hoping that might be enough to sate her Master. He smiles.]
Mysterious Zebra:
You were definitely worth taking a stamina potion for, slave. Let's see just how long you can
 keep this up for.
[Hours later...]

[Load]
[Will Save Fail]
Celestia:
You can just Load again.
Rainbow Dash:
... not yet. I just wanted my jaw to stop hurting for a bit.