The mechanic was purposefully used in all ten core animal creature types, because we thought it was something all the archetypes would enjoy
It will feature Pokmon ex cards of the new Paradox Pokmon thought to be Ancient ancestors of the Johto Beasts (Raging Bolt, Walking Wake, and Gouging Fire) and those thought to be Future descendants of the Unova Swords of Justice (Iron Leaves, Iron Crown, and Iron Boulder)
However, as explained by Hugh McMullen, former Wizards Director of Communications, the cards are not meant to symbolize 'racism' or discrimination, but actually the other way around
A scant few options have emerged as cEDH options within this sphere, but those that do exist are an absolute blast, and a great baseline for what one might do at a slightly lower power
No matter how shy Archon of Cruelty and Inferno Titan get, it knows how to pull them out of the graveyard and their shell
For example, if Prowler is blocked by a creature with 4 power, and then an effect gives that creature -3/-0, it won't stop blocking Prowler