To make chaos work for you, you must exercise a bit of control, but not too much. On your next spell, you manage to achieve the outcome you desire.

Encounter   ✦     Arcane
No Action      Personal

Trigger: You use a sorcerer power that works differently depending on whether the attack roll is odd or even

Effect: You choose to treat that power's attack roll as either odd or even, regardless of your actual roll.

Published in Arcane Power, page(s) 30.