Military action
The peace of the gods breaks out into war
The Gods took up residence in the Prime Material plane to live with their creations. For millennia, the Gods lived in peace. Life thrived on the material plane. Eventually, jealousy reared it's head once more as Gods began to covet the power held by other Gods. This led to the divine war. While battling on the prime material plane, the Gods first began to notice that they could weaken one another by destroying the followers of another God. In the intervening struggle, many gods and races were wiped from the earth. Wherever a God fell, their blood brought with it their power into the creation it touched.