Mørrskaðí, The Frozen Exile

Menace, Hexproof
When Mørrskaðí enters or attacks create X 2/1 Frostbitten, where X is equal to the amount of damage dealt by Frostbitten this turn
Damage dealt to players by Mørrskaðí gives all creatures the player controls -1/-0, when any creature reaches zero power by Mørrskaðí that creature is exiled and put onto your battlefield under your control with a base power and toughness 1/1
and is a frostbitten in addition to its other creature types