Wriggling, ebon tentacles of necrotic energy erupt from the ground, grasping toward every creature within reach.

Daily   ✦     Arcane, Implement, Necrotic, Nethermancy, Zone
Standard Action      Area burst 3 within 10 squares

Target: Each creature in the burst

Attack: Intelligence vs. Reflex

Hit: 2d10 + Intelligence modifier necrotic damage, and the target is immobilized (save ends).

Effect: The burst creates a zone of difficult terrain that lasts until the end of your next turn. Whenever a creature enters the zone, you can use an opportunity action to make the attack against that creature.

Sustain Minor: The zone persists until the end of your next turn, and each creature within the zone takes 10 necrotic damage.

Update (1/25/2012)
Updated in Class Compendium.

Published in Player's Handbook, page(s) 166, Class Compendium.