You infuse your ammunition with elemental fire as you attack with it, and it explodes in flames upon impact.

Daily   ✦     Arcane, Fire, Weapon
Standard Action      Ranged weapon

Primary Target: One creature

Primary Attack: Strength vs. AC

Hit: 2[W] + Strength modifier fire damage, and ongoing 10 fire damage (save ends).

Miss: Half damage.

Effect: Make a secondary attack that is an area burst 1 centered on the primary target.

  Secondary Target: Each enemy in the burst

  Secondary Attack: Strength vs. Reflex

  Hit: The secondary target takes ongoing 5 fire damage and grants combat advantage (save ends both).

Published in Martial Power 2, page(s) 96.