4 x
Alseid of Life's Bounty4 x
Destiny Spinner4 x
Starfield Mystic3 x
Dryad of the Ilysian Grove4 x
Banishing Light2 x
Chromatic Orrery1 x
Idyllic Tutor4 x
Sanctum of All2 x
Sanctum of Stone Fangs2 x
Sanctum of Shattered Heights2 x
Sanctum of Tranquil Light2 x
Sanctum of Calm Waters2 x
Sanctum of Fruitful Harvest24 Lands, mostly duals it's fine don't worry about it
I made this today on Arena and am having fun. The Sanctums themselves are surprisingly strong, more than I expected. Asleid and Destiny Spinner protect your board, Mystic ramps and gives you a (pretty weak) backup plan, Dryad ramps, blocks, and removes color issues. Orrery is funny. I haven't used it to draw cards yet, because I usually have SoA out by then, which means I have Calm Waters and do not need any card draw, but it is very cute. Mostly I had pulled a full set(!!!) randomly in packs and was like "huh, I guess it fits in a WUBRG jank deck".
This is a lot of fun.