Escaped Juicejaw

Flying, evolve (Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)
Whenever Escaped Juicejaw deals damage, proliferate once for each +1/+1 counter on it.
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The chemicals in its maw, once toxins, were altered by the Simic Combine to better suit their needs.