Fixing is hard, and some Commander decks really need the extra fixing
That being said, the deck works surprisingly well on its own with plenty of synergy built in
Instead of having to deal 40 damage or mill 90+ cards to take out one opponent, you only need to give them 10 poison counters
The ability that defines Regal Bunnicorn's power and toughness functions in all zones, not just the battlefield
This is mostly because K'rrik, Son of Yawgmoth is the single most popular new legend from Commander 2019 , but Chainer, Nightmare Adept is also fairly popular
It does, however, ask that you have a creature on the battlefield, where spells like Animate Dead, Reanimate, Exhume, and Unburial Rites do not