The design team quickly realized that the set didn't have enough support for a common Rabbit typal card, as the set had only two Rabbits
These alternate versions appear randomly in Japanese-language War of the Spark boosters, replacing the regular version of the planeswalker in the pack 50% of the time
In my opinion, the strongest things you can do in Mono Red are: "Glass cannon" decks that either quickly pop off and win before opponents can stabilize, like Storm, Krenko, Purphoros, Slicer Crushing nonbasic lands, aka defeating a large chunk of players with a single Blood Moon The problem with these two strengths is that they aren't always the right pick for casual tables
And you can already see that that devotion and willingness to spend money on an IP will transition perfectly to Magic, from the way Amazon preorders sold out in seconds, with people spending $210 on one box of play boosters - surely way more than they'll cost upon release
Magic the Gathering has changed a lot over its multi-decade history
So, we tweaked the amass mechanic to allow us to make whatever creature type we wanted the Army to be, changing the text of War of the Spark cards to amass Zombies