Nibble on Ixalan

Whenever a creature your opponents control
dies, if a creature you control dealt damage to
it, create a Food token. (It's an artifact with
"{2}, {t}, Sacrifice this artifact: You gain 3 life.")
Whenever you sacrifice a food token, put a
+1/+1 counter on target creature you control.
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River Heralds only have seconds to disable traps.