The One Ring

(Transforms from Magic Ring)
Indestructible
When this card transforms from Magic Ring or, if at
any time, you have twenty or more black cards in
your graveyard sacrifice equipped creature.
Equipped creature has skulk and hexproof. And
"When this creature attacks, mill four cards"
When The One Ring leaves the battlefield, you win
the game.
Equip: {p/b}{p/b}{p/b}