Geological / environmental event
Ulmat cocoons himself in a mossey, fungal mass at the base of the Godspyre. Before long he begins to release a gargantuan cloud of fungal spores which spread across the world by the great winds that vortex outwards around the tower. These spores bore the first seeds of life, and with the assistance of Falodo, would soon grow into the first plants, trees, and microworlds (bacteria/disease).