I would definitely put the Background cards Acolyte of Bahamut and Dragon Cultist in the 99 of my Miirym deck, Adventures in the Forgotten Realms Keeping with the D&D theme, we can dip back to Adventures in the Forgotten Realms for a nice selection of good Dragons
I love it alongside life gain from attacks like Orim's Prayer or the Command Zone eligible Patron of the Kitsune that will gain life for your attackers equal to their number
Relic of Legends is another good one
You want colors that feel correct, but you also do not want hyper-saturated nonsense that screams inkjet enthusiasm. ProxyMTG lands in a sensible middle ground
You can copy both sides of Farm // Market in a Sevinne, the Chronoplasm Commander deck
Every time your creatures connect, you create a Treasure, and you outright win the game on your next upkeep if you hit 30 or more artifacts