The Citadel of Chaos

With a motion, you fling your hand forward
and point to the floor beneath the sorcerer.
Smoke and flames burst from the ground.
Balthus Dire jumps back a little, startled, then closes his eyes to concentrate.
As they open, you can see a fire burning within the pupils themselves,
and he steps forward into the flame you created.
Taking a handful of flaming rubble, he throws this at you.

Will you duck to avoid it ?

or jump out of the way ?