Teferi, Scholar of Tolaria

Flash
When Teferi, Scholar of Tolaria enters the battlefield exile target creature. It gains suspend.
Put 4 time counters on it.
At the beginning of your post-combat main phase,
if 2 or more creatures left the battlefield this turn,
you may exile Teferi, Scholar of Tolaria then
return it to the battlefield transformed into
Teferi, Time Master under it's owner's control.