Example some Uncommon cards were printed 4x on each Uncommon sheet, like Oasis
I've actually been wanting to replace the Traitorous Blood it'll probably get swapped out with a True Conviction the manticore is pretty cute but i'll pass on it since he doesn't have haste
If you do, create a token that's a copy of that creature, except it's a Spirit in addition to its other types and it has "When this token leaves the battlefield, return the exiled card to its owner's graveyard." Whenever another nontoken creature you control dies, exile it
Playability is a broad category, and it is very subjective
I don't get why I would want to do that to get me to a win
But I also have if a single card shuts down your deck, then you really need to play more interaction