What is the Well of Eternity in World of Warcraft

There have been two different Wells of Eternity. The glowing, swirling pool known as the First Well of Eternity (usually just called the Well of Eternity) was once a lake containing immense arcane energy. It was originally located on the ancient continent of Kalimdor near the ancient night elven city of Zin-Azshari. The present area where the First Well of Eternity was located became the Maelstrom after the Great Sundering following the War of the Ancients.

The Second Well of Eternity is a massive pool of water infused with raw magic at the base of the World Tree. Coveted by demons, warlocks, and many mages, the well is currently the greatest source of arcane magic in the world. While the World Tree's powers have suppressed the corrupting nature of this magic for centuries, if the tree were ever destroyed, this Well would be the source of unfathomable power to an evil creature powerful enough to wield it.