mtg cards like the ozolith you may move all counters from The Ozolith onto target creature. The Ozolith | Ikoria: Lair

You can trigger all sorts of draw card synergies and drain synergies just by having this commander in play

Ive seen several lists that run colorless sources like Dreadship Reef, Ghost Quarter or Mikokoro, Center of the Sea

No one quite understood what we would do with this new type of mana, but I was hooked

(Bevy of Beebles) Backslide Bag Check Baleful Stare Ballad of the Black Flag Bane's Contingency Baral, Chief of Compliance Barrin, Tolarian Archmage Baxter, Fly in the Ointment Bearer of Overwhelming Truths Befuddle Behold the Multiverse Bellowing Crier Benthic Biomancer Benthic Criminologists Bespoke Battlewagon Betrayal Bewilder Bident of Thassa Birthday Escape Bitter Chill Blinding Spray Blink of an Eye Blitzball Stadium

You cannot find it in your library by transmuting Dimir Machinations

If you enjoy these, you can thank folks such as Micha Huigen, Justine Jones, and especially Sarah Wassel for bringing them to life