Mai, Torn Loyalist

Mai, Torn Loyalist doesn't untap during its controller's next untap step.
At the beginning of your end step, if Mai, Torn Loyalist dealt combat damage to an opponent
this turn, it comes under that opponent's control until the end of their next turn.
At the beginning of each opponent's end step,
if you don't control a permanent named Mai,
Torn Loyalist, each opponent loses 3 life.