Barricading Webs (4e Power)

Barricading Webs	Arachnomancer Attack 15
You call a great barricade of tangled webs into being.
Daily Arachane, Radiant or Necrotic, Conjuration, Implement
Standard Action	Area wall 12 within 10 squares
Effect: You conjure a solid wall of continuous squares filled with tangled webs. The wall can be up to 12 squares long and 6 squares high. Any creature that starts its turn adjacent to the wall takes 2d6 + Charisma modifier radiant or necrotic damage. The wall blocks line of sight and any creature that attempts to move through the wall stops adjacent to it and is immobilized until the end of their next turn.
Special: As a standard action, a creature can attack the wall. Each squares has 50 hit points. Any creature that makes a melee attack against the wall takes 2d6 radiant or necrotic damage. The wall has vulnerability 25 to fire. The damage type of this power is determined by your alignment; if you are good aligned then this power deals radiant damage; if you are evil aligned this power deals necrotic damage. Unaligned characters may choose the damage type of this power (either radiant or necrotic).