Sejuani, Fury of the North

Trample
At the beginning of each upkeep, if Sejuani, Fury
of the North was not dealt damage during the
last turn, she gets +2/+2 until the end of turn.
Whenever Sejuani deals combat damage to a
player, tap up to a number of target creatures defending player controls equal to the damage
dealt. Those creatures don't untap during their controller's next untap step.