It's quite the face puncher
I kind of hoped this would find its way into Standard when The Brothers War (BRO) released, given its relevance in regards to that set, but alas
Even if you draft too many Sacred Cats, you can leave some in the sideboard for other aggressive decks for when you need time to go grindy with your better Embalm creatures or to set up a big turn with In Oketras Favor
This is important, because standard free-for-all Magic tends to be more endurance test and chat-fest than actual game everyone sit around, randomly pick at people, turtle up, and ignore the guy who built the abusive innocent-looking deck until he combo kills the entire table three hours later (having spent at least two of those hours whining about how he wasnt a threat
So, for example, suppose you have a five-cost Marrow-Gnawer
The Mono-Black version doesnt have much to take advantage of that, but filling your graveyard with Dread Wanderers and other Zombies does help your Diregraf Colossuses get out of burn range