The Overmind

{t}: Add {w/b}{b/g}{r/w}{r/g} to your mana pool.
Eternal Will—Opponents cannot take control
of Zerg permanents you control.
Assimilate—At the beginning of your upkeep,
return target creature card from target graveyard
to the battlefield under your control. That
creature is a Zerg in addition to its other types.
If that creature would be sent to a graveyard,
exile it instead.