The Ring of Power

Indestructible
Equip {1}: Equipped creature has Shroud and is Unblockable
{3}: Put a charge counter on The Ring of Power:
Exile equipped creature from the battlefield
until the end of turn. When that creature enters
the battlefield equip The Ring of Power to it then
put a -1/-1 counter on equipped creature for each charge counter on The Ring of Power
"One Ring to rule them all, and in the darkness
bind them"