Notorius Toadrider

Acclaim 2 (When this creature deals combat damage
to a player or planeswalker, if it isn't acclaimed, put
two +1/+1 counters on it and it becomes acclaimed)
When Notorius Toadrider enters the battlefield
tap all creatures you don't control. For each
creature with flying tapped this way unacclaimed creatures you control get +1/+1 until end of turn.
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The croaks of her mount signal glory for her comrades
and doom to her foes.