Kel'Thuzad, the Lich

Flying

Whenever Kel'Thuzad, the Lich enters or attacks, tap target creature you don't control
and put a stun counter on it.
Chain Frost — {6}: Kel'Thuzad, the Lich deal
X to each creature you don't control with a
stun counter, where X is twice the number of
stun counters among the creatures.