Creation of the Weave

Celestial / Cosmic

The mortal Myldala gains enough power to access planar magic, using it to weave the astral plane into the rest of the planes, connecting them together permanently. She cuts off planar magic from being accessible to anyone else, recognising that the power in the wrong hands could do apocalyptic levels of harm. This event gives mortals more ready access to arcane magic, and solidifies Myldala's place as a Greater Deity, in the time before new deities being created was incredibly rare.