Slumber of the Winter Court is a 15th level Wizard Daily power that was introduced in Heroes of the Fallen Lands.
Slumber of the Winter Court
Wizard Attack 15
As you whisper a slow chant, your foes suddenly stumble and sink to the ground in a magical slumber.
Daily ✦ arcane, charm, enchantment, implement
Area burst 2 within 20 squares
Target: Each creature in the burst
Attack: Intelligence vs. Will
Hit: The target is dazed and slowed (save ends both).
First Failed Saving Throw: The target instead falls unconscious. The unconsciousness ends if the target takes damage, or after 1d4 hours.
Miss: The target is slowed (save ends).
First Failed Saving Throw: The target instead falls unconscious (save ends).