Proliferation is precisely the reason why we want to play this card later than you'd expect: having access to a repeatable, not-so-expensive, proliferate ability isn't something you come across every day, so we might as well respect it as we should
2 and 3 will likely come later in the year, alongside starters from the remaining generations including Johto, Hoenn and Unova
While on the surface, this is just another Rush top end for red decks, Roger comes with an added effect that as long as either you or your opponent have zero life left, if your opponent activates a blocker, they will lose the game
But thats felt less and less common, so now use as more of a 1 of that can tutor for with Oracle
Instead Zaxara allows you to build a hydra tribal deck with more reach by using non-creature spells like Biomass Mutation, Dominate, and Torment of Hailfire to progress our game while creating even more hydra
Play the usual TeraZard line, evolve to put 2 Fire on Active and 1 on a backup Mander, take some knockouts, then before the first TeraZard gets KO'd (or if you have other ways to keep 4 energy in play, which Zard/Pidgeot should be able to do), evolve to a MegaZard and take out any opposing megas by dealing 380 damage