Instant ramp: Growth Spiral, Harrow, Omen of the Hunt, etc, Sorcery ramp: Into the North, Cultivate, Natures Lore, etc
I like it in decks that want to discard with Mask of Memory and other effects, too
Roaming Throne Of course, this makes Sheoldred, the Apocalypse better, as well as the hundreds of cards across formats with triggered abilities
While there are some exotic colourless lands you can play beyond the auto includes I think it is much more important to finish off your land count with reliable fixing
Y'shtola Rhul can immediately come into play and blink a creature on the end step, which happens twice thanks to its ability
If you cast a commander from your hand, the commander tax doesn't apply