When you complete the spell, your foe resigns itself to the chill of death, leaving holes in its defenses.

Daily   ✦     Arcane, Cold, Implement, Necromancy, Necrotic
Standard Action      Ranged 10

Target: One creature

Attack: Intelligence vs. Will

Hit: 4d10 + Intelligence modifier cold and necrotic damage.

Miss: Half damage.

Effect: The target gains vulnerable 5 to all damage (save ends).

Published in Heroes of the Feywild, page(s) 98.