Athora

The Athora was a gigantic alien rock located under Thaymount, which greatly enhanced magic spell and magic items. It was considered one of the major reasons behind the power of the Red Wizards of Thay.

Powers
In addition to its innate abilities to empower magic, the Athora was a weave anchor, helping Mystra stabilize the Weave.

History
The Athora was created by the Ba'etith. It was located in the Assikhath, a cavern deep under Thaymount guarded by powerful protective statues.