Colonel Jexara, The Studious

Flying
Whenever Colonel Jexara, The Studious deals
damage, you may tap target creature defending
player controls. If you do, that creature doesn't
untap during its controller's next untap step. If
there are no options, then their next creature card played will not untap.
{5}{w}{u}: Colonel Jexara, The Studious gains Indestructible until the end of turn.
If Colonel Jexara, The Studious is left as your only creature card on the battlefield, Scry 4.