Gather Marauders

At the end of your turn, put a massacre token on Gather Marauders for every mutant that went
to the graveyard from play this turn.
Remove a massacre token from Gather Marauders
and create three marauder creature tokens, a 0/1
blue token with flying, a 0/1 black token with
menace, and a 0/1 red token with haste. Do this
only once each of your turns.
Marauders creatures you control get +1/+0