Kaheera, the Orphanguard If you're fully committed to an all-Cats deck, Kaheera, the Orphanguard is worth picking up
It's a somewhat demanding deck that will require you to plan your Challengers well and save valuable resources for the right moment, but it's also a fun deck that can be made much stronger very easily by swapping in a few more Evasive cards, like Genie, On the Job and Goofy, Daredevil
UR Ultra Rare Unpossessed X TRAP Continuous "Charmer" monsters you control cannot be destroyed by battle
As well as Yusei, Jack, and Crow, as not only the remaining members of the Enforcers, but also when they play a 3 vs 1 duel against the last Dark Signer
The more ways you can play by adding mana on the battlefield, the more likely you are to play the large game-changing effects that Ulalek and the other Eldrazis can do to guarantee a win