Sephiroth, the Savior / Atraxa, Grand Unifier (FCA) $35 Most FCA cards are excellent in one Magic format or another
Even if you arent using it to fuel powerful 1-mana spells like Pyroblast or Winds of Change, Simian Spirit Guide also does a good impression of Lotus Petal, and can help you rush out cards like Dockside Extortionist or Underworld Breach to fuel bigger plays or simply combo off a turn ahead of schedule
As it stands, MTG Final Fantasy spoilers show a PSX-era Yuffie as Yuriko, The Tiger's Shadow and Dragon of Mount Gulg as Ancient Copper Dragon
Yes, there were players who splashed a second colour for utility and sideboard cards but before Sling-Gang Lieutenant goblins stuck to the consistency that a mono-coloured deck offered
Hopefully, I was able to demonstrate some of the unexpected richness in this seemingly narrow school of spells from the defensive reanimation of Nim Deathmantle to the inevitable combo tool of Dread Return, the grindy engine that is Whip of Erebos to the explosive tribal finisher Patriarchs Bidding, and even some weird off-color gems like Reincarnation and Replenish
