Legendary Artifact — Equipment
Equipped creature gets +1/+0.
When equipped creature deals combat damage to a player, unattach Elbrus, the Binding Blade, then transform it.
Those who grasp its hilt soon hear the demon's call.
Legendary Creature — Demon
13 / 13
Flying, intimidate, trample (A creature with intimidate can't be blocked except by artifact creatures and/or creatures that share a color with it.)
Whenever a player loses the game, put thirteen +1/+1 counters on Withengar Unbound.
There are not enough lives on Innistrad to satisfy his thirst for retribution.