I see in the “Death Masks” the Mystra’s restrictions for mind control and some issues with resurrection spells… Will it have an impact on the rules of 5th edition or new adventures, new AL season? Is it canon for D&D? Yes, it's canon. DEATH MASKS includes many details and elements intended to directly support the game. HOW Mystra's desires will play out in specifics at the gaming table is partly something for DMs, but will be reflected in the rules. New AL adventures? Can't say.#Realmslore

— Ed Greenwood (@TheEdVerse) February 26, 2019