Frostmourne

Equipped creature has:

Whenever equipped creature attacks, Undead creatures under your control gain Vigilance until end of turn.

{t}{w}{u}{b}: Exile target creature from your graveyard, create X Corpse tokens. Where X is the creature's converted mana cost.

"Whomsoever takes up this blade shall wield power eternal. Just as the blade rends flesh, so must power
scar the spirit."