Life Insurance Even more niche, even more crackable, Life Insurance gives you Treasures instead, which is nice in a fair deck, better in aristocrats, and it goes infinite with a variety of combos, like say, Ashnod's Altar with something like Reassembling Skeleton and Falkenrath Noble
Golos, Tireless Pilgrim is clearly a 5-color commander, but it became the go-to commander for 5-color decks and was hurting diversity in the format in the same way (if not worse than) the rest of Commanders banned cards
Ive also excluded artifact lands and basic lands, since they produce multiple mana where affinity is concerned (and itd be both silly and false to say that Plains produces multiple mana on its own)
While there are obvious auto-includes in this deck, its the more niche stuff that makes me excited