You level your clenched fist toward your foe and unleash a terrific blast of black flames.

Encounter   ✦     Arcane, Fire, Implement
Standard Action      Ranged 10

Target: One creature

Attack: Constitution vs. Fortitude

Hit: 5d10 + Constitution modifier fire damage.

  Infernal Pact: You gain a bonus to the damage roll equal to your Intelligence modifier.

Published in Player's Handbook, page(s) 139, Class Compendium.