Cube of Doom

Whenever an opponent would roll a dice, he must roll
twice. You chose which roll counts. Whenever a
creature dies, put a Doom counter on Cube of Doom and
untap it.
At the end of each turn each opponent loses life equal to
the number of Doom counters on Cube of Doom.
Whenever Cube of Doom is attached to a creature, its
controller must unattach all other Equipment attached to it
and roll a d6. Cube of Doom deals damage equal to the d6
roll to that creature.
Dequip - {b}{b}{b},{t}: Attach this arti