Amass abilities are now written as "amass [subtype] N." Previous cards with amass have received errata to say "amass Zombies N."
Invading Manticore
In the rare case that you control multiple Army creatures (perhaps because you played a creature with changeling) while you amass Zombies, you choose which of your Army creatures to put the +1/+1 counters on. If that creature isn't a Zombie, it becomes a Zombie in addition to its other types.
To amass Zombies N, if you don't control an Army creature, create a 0/0 black Zombie Army creature token. Then you choose an Army creature you control and put N +1/+1 counters on it. If that Army isn't already a Zombie, it becomes a Zombie in addition to its other types.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Jehan Choo
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
