make your own yugioh deck Complete Custom for Yu-Gi-Oh! YGOPRODeck Deck Builder can now

Each time you proliferate, you can choose any permanent that has a counter, including ones controlled by opponents

It's more of a new way to handle an existing ability that we've seen fairly frequently

return 1 of your banished Level 8 Synchro Monsters to the Extra Deck, then you can Special Summon that monster from the Extra Deck, also you can only attack with "Malefic" monsters for the rest of this turn.

However, the rarest type in the Pokemon TCG is one you're probably familiar with: the Fairy type

One of the most optimal ways of doing this was Thunder King Rai-oh, and it was so powerful that players were only able to use one copy in competitive formats for a long time