Your foes are horrified when squirming maggots bulge from their bodies, then transform into biting flies.

Encounter   ✦     Implement, Primal
Standard Action      Close blast 3

Target: Each creature in the blast

Attack: Wisdom vs. Fortitude

Hit: 2d6 + Wisdom modifier damage, and you can slide the target up to 2 squares.

Effect: Until the end of your next turn, each target grants combat advantage and gains vulnerable 5 to all damage.

Published in The Book of Vile Darkness, page(s) 1-27.