rarest pokemon card in evolutions MewTwo 51/108 Rare Pokemon XY 2016 TCG XY showcasing its Mega Evolution form. Pokémon TCG: 10 Prismatic Evolutions

FINAL FANTASY III "What the heck is an Onion Knight?" These words, uttered at a playtest, may have caused every card in Magic: The Gathering FINAL FANTASY to change

Notably, if it has somehow gained double strike, it will convert before dealing combat damage in the regular combat damage step

Originally believed to be UK-exclusive, it actually shipped to the UK, Australia, and the US, and famously corrected the long-standing Vulpix "HP 50" typo (which read "HP 50" instead of "50 HP" in the previous seven print runs)

Origin, Necrogen and Sunbeam Spellbombs are also worth looking at, as repeatable card draw for 2 mana isn't bad

EXAMPLES: There are a small selection of examples of previously completed card alters here on this page