Kori, Beastmother

Trample
Acclaim X (When this creature deals combat damage
to a player or planeswalker, if it isn't acclaimed, put
+1/+1 counters on it equal to the amount of damage
dealt and it becomes acclaimed.)
Other creatures you control get +1/+1 for each counter on Kori, Tamer of Beasts.
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"Come, see why my name is legendary."