The One Ring

Indestructible
Equipped creature gets +3/+3 and can't be
blocked except by Ringbearers.
At the beginning of your upkeep, put a -1/-1
counter on equipped creature. When equipped
creature leaves the battlefield, flip a coin. If you
win the flip, you may attach The One Ring to
target creature. If you lose the flip, put the One
Ring at the bottom of your library.
Equip {2}