Karumonix, the Rat King Its imperative to see the new king and god of certain tribal builds in new sets
Final Fantasy VII being one of the more referenced games in media made it a strong first contender
Each player builds their deck
The idea is simple: Get ahead on the board, then wipe everyones mana so the opponent cant catch up
Aside from the fact that this is probably the most cataclysmic event the game has ever seen story-wise, it's also the first set in an extremely long time to introduce a new card type, as well as just generally being jam packed full of crazy legends, double sided cards, new mechanics, and more
It may only trigger once per turn, but this effect is something to be reckoned with in the span of a game