yugioh zoodiac cards RA04-EN091 - Barrage - Quarter Century Secret Rare 1200 Defense Zoodiac Barrage UR — Quarter

Mega Dragonite ex 152/217 Loading

Leafeon ex (Special Illustration Rare) - $265.63 Kicking off the top three, we have Leafeon ex SIR

If Ugins Labyrinth is indeed S tier, it will likely be in conjunction with Devourer of Destiny to get up to enough playable 7 drops to consistently get 2 mana off the Labyrinth

Legality depends on the tournament format -- Seed of Deception can be legal in some formats and banned or restricted in others

It doesn't matter if Oko leaves the battlefield before the ability resolves or later in the turn

I dont play Modern and dont have a notion of how competitive Modern Cats is, but Id definitely put this in a pet cat deck