Hide between the rocks

You hide between the rocks.
When they pass through your area, with horror you realize the truth: They are not mounting bipedal creatures, they are female humans!!

The girls move carrying the small creatures on their backs. Their naked skin is stained with dirt and sweat and they have bridles of leather and metal. If they move slow, they whip their asses... this is so cruel... but it's not your world, not your problem.

One pauses for a moment near your hiding spot, you move your fingers preparing a spell, you can't see his hooded face but the creature is smelling the air... You hear his creepy high-pitched voice "I smell you, you are close, I will find you" he mocks.

Seconds later... He tries to surprise you and hit you with his whip.
"Found you!" he screams.
You release your spell and your hands burn, the creature and his poor girl-mount are engulfed in flames and reduced to ash. But 3 others surround you.

You can try to move and cast a fireball, but they are scattered. You can pretend that you surrender, but prepare a thunderwave and release it when they are closer.