Ondoxar, Iceshard Effigy

Flying.
When Ondoxar, Iceshard Effigy enters the battlefield tap target creature. That creature doesn't untap until Ondoxar, Iceshard Effigy leaves the battlefield.
{x}{u}: Tap x+1 target creatures. (Only activate this ability at anytime you could cast a sorcery, and only once each turn.)