Generally speaking, in decks that are three or more colors, you want to play almost all dual lands, along with enough basic lands to support whatever ramp is in your deck (Land Tax, Kodama's Reach, Rampant Growth, et al.)
Calix, Destinys Hand ($2 to $5) You can get the borderless foils for under $5, with random copies reaching to nearly $3
12 Liesa, Shroud Of Dusk Liesa, Shroud of Dusk is a solid option for an Orzhov Stax commander, capable of making it quite costly for opponents to cast their spells
As they print more locations, Jim just gets better and better
All five enemy-color fetch lands appear as Special Guests cards, with non-foil versions showing up in Play Boosters and traditional foil versions showing up in Collector Boosters
Another reserved list card Bone Mask also has a similar ability or preventing damage, except that you can likely only use it once per round since it has to tap, plus youll likely be Exiling a lot of cards from your Library just to stay alive