Worshipped by students of academia, dark cultists, and philosophers the world over, Tsh'Ah is known as the keeper of all knowledge that is dangerous, forbidden, and meant to be lost to time. Having worked closely with Calypso in the early days of Vault to ensure knowledge was split between the knowable and unknowable, Tsh'Ah has special charge over the locations of such things as fallen gods, magical artifacts, and monstrous entities.
She fell to a fight against Lloth and Tyr in the Constellation War when they broke Tsh'Ah to discover where Shapeless was keeping Sune.