Well met realmsfather! Looking more into deep underdark and it’s integration with Toril… Does the Underdark beneath Faerun/Kara-Tur connect with Underdark realms beneath Zakhara, Maztica, or the other continents? Beneath more shallow portions of the seas perhaps? Oh, yes. Everything connects. Not that the journeys may be safe, mind you.#Realmslore

— Ed Greenwood (@TheEdVerse) May 21, 2021