You gauge your opponent's moves, attacking where the creature is weakest and cutting off its ability to escape.

Daily   ✦     Arcane, Weapon
Standard Action      Melee weapon

Target: One creature

Attack: Intelligence vs. Reflex

Hit: 3[W] + Intelligence modifier damage, and the target is immobilized until the end of your next turn.

Effect: Until the end of the encounter, whenever you hit the target with a melee attack, it is immobilized until the end of your next turn.

  Aegis of Ensnarement: Until the end of the encounter, whenever you hit the target with a melee attack, you can knock it prone instead of immobilizing it.

Published in Arcane Power, page(s) 58.