pokemon card x - Salamence LV.X (98) - Arceus ex as a central highlight POKÉMON CARD GAME S8a-P 018/025

You'll put a time counter on it at the beginning of your upkeep, and once you have at least one you'll be able to Time Travel (or proliferate) them to either of your hearts' content!

Fable Of The Mirror-Breaker A Smash Hit Neon Dynasty saw the introduction of double-sided transforming Sagas, that flip into a creature on their last chapter

I believe an early version of this card experimented with each Zombie getting to give -1/-1 to target creature until end of turn, but that ended up being too powerful, and the spell would often decimate the other side when cast late in the game

Collector Nostalgia Cards from the 151 set like Gengar, Dragonair, and even Poliwhirl hit players right in the nostalgia