The pre-Calamity flashback

The last in-person session before COVID. A sphinx in The Burg sent the PCs into the bodies of the original Fatemakers, level-20 heroes from before The Calamity, to fight its final battle: Drawurum, Sploosh, Kilseth, Farberos, Hordal, Zaleon and Herentor (a wizard with Intelligence 20).

Herentor turned the Nethershaper (Mol'maroch The Nethershaper) to obsidian and Kilseth shattered it. The soul of Mystra was called on to seal the southern continent, through a sequence of Planetary Schism (which changed the world's weather), Global Suggestion and Cosmic Lock; Mystra's soul became the "building blocks" of the lock. Herentor was torn apart, Pandemonium leaked in, and she and her ring vanished from the plane.

The Chromatic Conclave, dragons who served the Nethershaper, have magic teeth; four of them were slain to end the Calamity.