Krystal, Queen Bee

You may choose to have Krystal not untap
during your untap step.
Spirit Guardians - Whenever a creature attacks
you or a planeswalker you control, that creature
gets -1/-1 until end of turn.
Dominate Person - {2}{u}{u}, {t}: Gain control of
target creature for as long as Krystal remains
tapped.