In the most literal sense: what’s the biggest phylactery in the Realms? I'm not certain which is the biggest, but the largest I know of is an airship of enchanted alloys fused together into an elegant sealed vessel hundreds of feet long. It floats hidden in a cavern that it almost fills. Where? Ah, that would be TELLING.#Realmslore

— Ed Greenwood (@TheEdVerse) January 11, 2022