Theyre in the Illumineers Quest: Deep Trouble box which we have put into its own set below
While that may seem like a lot and realistically, it is given the scope of what you can do in Commander, and the different approaches you can take when brewing (budget, win condition, theme, kindred, etc), it can come together quite easily and offer a varied set of decks to pilot
White has access to Stax-y Humans like Grand Abolisher and Drannith Magistrate, and also has tutors on bodies like Imperial Recruiter and Recruiter of the Guard to find additional answers
It doesnt look like theres a whole ton of cloaking in the set, which means it will probably be fun and special when it does come up
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No Mercy is a great symmetry breaker, especially in decks that want creatures to attack each other player or decks with the monarch mechanic