Well, according to the official MTG rules, tournament-legal Magic: The Gathering cards should measure 2.5 x 3.5 inches, or 6.35 x 8.89cm, however if you're creating novelty cards then there's no need to stick to the rules
Leaning in would mean playing some fun cards that have no other home, like Confusion in the Ranks, Forgeborn Oreads, and various other blue enchantments you like
The SIR has more long-term collector appeal than people give it credit for
He also has a Pokmon Body that acts as an additional 4 PlusPowers, which may not sound like a whole lot to depend on when relying on an attack to activate it, but since many people dont see it coming, it can result in an easy 1HKO on Gengar by Uxie, Nidoqueen by Uxie or Blaziken, any water Pokmon by Luxray, etc This extra damage saves you PlusPowers and Crobat Gs, which are key to 1HKOing the big threats with Blaziken
Haste to let you smash, and safety from counterspells