The Blue Rose Cycle
The Mishtai is the ultimate avatar and protector of the Incarnum plane. Scant information is available on the being outside of Duskling sources and even those describe the Mishtai as a force of nature. What is known is that the creature has the capability of changing its shape and being in more than one place at a time. It possesses strength and size enough to lay waste to entire cities in moments. Even more unsettling, the being seems closely tied to the Mist and Incarnum which flows in its destructive wake.
The Mishtai is thought to be what destroyed the advanced Duskling civilization that existed before the arrival of Gallatinian humanoids from the prime material plane. More recently, the Mishtai played a key role in the ultimate destruction of Nexus.