Here are some incentives for it: Cards like Corrupt, Cabal Coffers, Mutilate, and Defile want you to play as many swamps as possible, so their efficiency is maximized in mono-black decks
Thassa, Deep-Dwelling A source of blink thats both difficult to interact with and that can start to turn the tide in grindy matchups with the expensive tap down ability, Thassa, Deep-Dwelling is a possible commander, but it really occupies that niche of a must-play card in any blink deck you build in Commander
This red sorcery is going to be strong in a lot of scenarios, and to maximize its effectiveness, its good to use commanders that benefit from that creature type entering the battlefield or attacking, so youll get many triggers
Overall, the new Shimmering Skies Starter Decks are fun, easy-to-learn, and effective additions to Disney Lorcana