Domination Monolith

Domination Monolith enters the battlefield tapp-
ed and doesn't untap during your untap step.
At the beginning of your upkeep, you may sacri-
fice a non-token creature to untap Domination Monolith.
{u}{u/b}{u/b}{b}{x}, {t}: You control target creature with
mana cost X.
The Aboleth cultist's monolith holds the power to subjugate even the mightiest beings.