2018 Fun Fact: The appendix of Plane Shift: Ixalan is an extended musing on what the colors of Magic mean in D&D terms, born out of stuff I wrote down as I was trying to find my way on the Magic team after I moved from D&D. Some of it nearly ended up in the Ravnica book, but @JeremyECrawford and I eventually decided that the Guildmaster's Guide would be better off without explicit reference to mana colors.

— James Wyatt (@aquelajames) February 11, 2020