mtg black madness cards Kyoki, Sanity's Eclipse – Moon Target creature deals damage to itself equal to its power. MTG Magic The Gathering Card

It's in Sultai colors, which has the highest selection of mutate cards to choose from

There are also a handful of cards that work great with the deck if you can come up with ways to remove the -1/-1 counters from your creatures

Aerith, Last Ancient feels like a particular curveball here, since lifegain is a pretty small part of the deck overall

And that's just Commander

Even if youre using it just for the lifegain, its a solid choice in your black decks

The Mono Black Control deck that surfaced at the start of the format could really benefit from a powerhouse like this, so hopefully this will be enough to change the landscape of Standard for the better