A pool of darkness forms beneath your foes, clinging to them like something alive as they struggle to escape.
Encounter ✦ arcane, implement, necrotic, shadow, zone
Area burst 1 within 10 squares
Target: Each creature in the burst
Attack: Charisma vs. Reflex
Hit: 1d10 + Charisma modifier necrotic damage, and the target is slowed (save ends).
Effect: The burst creates a zone that lasts until the end of the encounter. Until the zone ends, you can use the secondary power at will.
At-Will ✦ (implement, necrotic, shadow)
Ranged 10
Trigger: An enemy enters the zone willingly or ends its turn there.
Target: The triggering enemy
Attack: Charisma vs. Reflex
Hit: 5 + Charisma modifier necrotic damage, and the target is slowed (save ends). If the target is already slowed, it is instead immobilized and takes ongoing 10 necrotic damage (save ends both).