Ancient Skinwalker

Deathtouch, menace
{3}{s}{s}{t}: Put a Snow counter on target permanent. Until end of turn, other Snow creatures can't attack or block and abilities of snow permanents can't be activated unless they are mana abilities.
When Ancient Skinwalker enters the battlefield, you may exile target creature an opponent controls. As long as that creature remains exiled, Ancient Skinwalker. If Ancient Skinwalker would die, instead put the exiled creature into its owner's graveyard, then regenerate Ancient Skinwalker.