Abyssal Cold (4e Power)

Abyssal Cold	Grim Blackguard 4e Power Type::Attack 12
When you hit your enemy with your weapon, he freezes and cannot move
4e Power Usage::Encounter  Divine, Shadow, Weapon
4e Power Action Type::Standard Action	Melee weapon
Target: One creature
Attack: Strength Vs. Will
Hit: 2[W} + Strength modifier cold damage and the target is immobilized until the end of your next turn