yugioh hat format card pool Complete Side Deck Guide: Traps The Next Big Retro Yu-Gi-Oh

And there are 25 legendary backgrounds: 5 commons, 15 uncommons, and 5 rares

TCGPlayer for a stack of raw singles

Shaun & Rebecca, Agents Shaun & Rebecca, Agents are entirely themed around fetching up The Animus to the field and then using it to change creatures on the field into copies of the legendary creatures it exiles

So maybe they are more like my style of decking

7/7 Legendary Creature - Slug Horror At the beginning of each end step, put a slime counter on each creature you don't control

There are also special kinds like EX, V, VMAX, VSTAR, and Ancient/Future cards in newer sets, so if you've been out the mix for a while, you're bound to see some new types