You are shrouded by the essence of chance, which distorts every spell you cast.

Encounter   ✦     Arcane
Minor Action      Personal

Effect: Until the end of your next turn, you add 1 entropy point to your pool whenever you roll a natural 10 or higher on a d20, and you subtract 1 entropy point from your pool whenever you roll a natural 9 or lower on a d20.

Published in Arcane Power, page(s) 121.