Tellann was the Elder Warren used by the Imass. Later, Imass Bonecasters used the power of Tellann to invoke the first Ritual of Tellann thereby creating the T'lan Imass and changing Tellann forever. A remnant of Tellann from before the ritual was shown in the Refugium. Tellann was said to gift the world with fire and heat in a world of cold emptiness. The Warren smelled sweetly of "wet tundra, acrid mosses and softened lichen" on a soft, warm breeze.