Assrius, the dark one

Bestow {6}{r}{u}{b}:(If you cast this card for its bestow
cost, it's an Aura spell with enchant creature. It
becomes a creature again if it's not attached to a
creature.)
Last Strike
Whenever Assrius, the Dark one deals combat
damage to a player, that player loses the game.
Enchanted creature has Last Strike and: Whenever
this creature deals combat damage to a player, that player loses the game.