Ohmen, Demonic Usurper

Indestructible, haste, hexproof, whither
This creature cannot be sacrificed.
At the beginning of each player's upkeep,
that player gains control of this creature and
untaps it.
At the beginning of your endstep, sacrifice
another creature.
{b}{b}{r}: Ohmen's controller loses 2 life and
discards a card. Any player may activate
this ability.