Earthseed.

A cult exists on one of the Kelador Isles that holds no qualms about maligning the gods and attempting to destroy their reputation. The isle they reside on is windy and surrounded by rough waters; remaining on this island shows one’s dedication to the cause and hatred of the gods

The cult is led by Viskold, a former high-ranking ancient is the Samottai nation. Belittled by the gods for his limited magic compared to their own, he has vowed to bring them down. Though he speaks only of destroying the gods’ life force, he also wishes to enhance his own magic through the collection of crystals from the Red Narrows. His ultimate goal is to take possession of the beasts imprisoned within the floating island.

People from every nation have fled to the island in search of fulfillment which they believe they don’t receive from their god. Defectors from the Isles of Kelador (fire) believe the goddess is a coward for never showing herself; don’t believe she is actually a dragon. Those from Ihlathi (earth) are mostly satyrs that don’t believe in reincarnation and believe the entire religion is a sham to get believers to do things for the god. From Akitai (water) come crows and magpies that are tired of being treated like a lower tier simply because they live in the mountains, away from water; they think their god is too laid-back and needs to treat them all equally. Defectors from Aerakos/Brisa (air) want their goddess to be more involved; think she doesn’t actually have power because she doesn’t do anything that they can see. And a host of followers come from Samottai since their god was killed. They think that this shows all the gods’ vulnerability and lack of absolute power.

The cult preys on the susceptibilities of people from every nation to convert them to the cause. They send former members of every nation to their respective nation in order to blend in easier and relate to residents of that area. They travel by way of ships that are captained by former residents of the Akitai (water).