Use your magic to convince the chief

As you watch the goblin chief getting ready to cast a spell on you, you remember that you don't need any special preparations to cast your spells. You pick both of your hands up off the ground and grab underneath each of your tits, doing your best to squeeze them and show off their fullness. Despite your best efforts, though, you get slightly self-conscious at the fact that most of your massive tits are spilling out in between and past your fingers.

You forge ahead anyway, focusing your magic toward the chief and finalizing your Charm on him. He stops in his tracks, sets his hand on his throne, and stares blankly at you. Emboldened by your apparent success, you put on your best pouty face and bounce your boobs in your hands. "Could Master let me go instead?" You ask in as sweet and innocent a voice as you can muster.