if you have no cards in hand mtg Demonfire [Dissension] No Hands! • (Mono-Black Commander

Some general notes about -1/-1 counters: If a creature has +1/+1 counters and -1/-1 counters on it, state-based actions remove the same number of each so that it has only one kind of those counters on it

Or you can whip up a combo brew with Yawgmoth's Will or Auriok Salvagers

There is a bit to track with the wide range of counters you might use, but some colored dice do nicely to differentiate the counters

I'm also seeing repeating instances of Ward (basically meaning your character can't be messed with unless they're challenged in an attack) which balances nicely with Steel cards

Natures Rhythm Greens ability to tutor creatures directly onto the battlefield is one of the strongest things that the color is able to do, especially when it includes a way to do it at a reduced mana cost