Fight him

Your hand burns with a fireball spell, and you are ready to turn him into ashes, but his glowing fists pulse with arcane energy; he interrupts your magic with a counterspell, and your flame snuffs out like a candle on the wind.

He moves closer, but you manage to avoid his punch with a magic shield, Your hands burn with fire energy, but he absorbs part of the damage and laughs behind the mask. "Cute..." he says, and hits you on the stomach with his powerful fist.

You are on the floor, gasping for air.

You can surrender and try to reason with him and survive.
Or you can keep fighting and try to beat the colossus.