Golden Dusk Aristocrat

When Golden Dusk Aristocrat enters the battlefield, tap target creature an opponent controls. It doesn't untap during its controller's
untap step for as long as you control Golden Dusk Aristocrat.
{1}{w}{u}{b}{r}, {t}: Target player sacrifices a tapped creature they control. Golden Dusk Aristocrat deals damage to that player equal to 7 minus the sacrificed creature's power.