Elspeth, Undaunted Hero I think we have to include the one planeswalker with devotion, even if I dont think its overly powerful
Creatures with powerful triggers when opposing creatures die get stronger, but they weren't that strong to begin with
Myr act as a sort of catch-all for the Magic sets theyre released in
For instance, you could use it as sacrifice fodder to an Akki Scrapchomper to draw cards, or could be tapped by a Citanul Stalwart to create mana
Hydro-Man spent over a year with "become an Island" text until, near the end of the process, our kindly editor reminded us that would cause him to lose all other abilities, which causes numerous weird rules interactions
Most of them have been spoiled by the passage of time