The One Ring

When The One Ring enters the battlefield, equip
it to target enemy creature. If they have no creatures, equip it to the first creature they play.
Place The Cracks of Doom onto the battlefield
tapped.
Equipped Creature only untaps during their
controllers every other upkeep. If equipped
creature dies, the controller must equip it to
another creature. If the ring is dropped into
The Cracks of Doom it is destroyed, and
The Dark Lord Sauron is killed.