Edict of the League

You may only trigger this card effect if you control a Hunter with League that was not granted the subtype. Hunters you control gain the subtype League. Whenever a Vermin dies, put a Purge counter on it. For every 3 Purge counters on League Manifesto, Hunters you control get +1/+1.

{t}: If a Vermin was destroyed this turn,
add {c}.