This is Ygg my testing world building project. It is totally free to use and anyone can make stories, characters, concept art, etc. as long as it's in the context of the world and story.

• Titans are massive monsters made up of natural disasters such as magma floods, blizzards, lightning storms etc. They are the physical manifestations of chaos within the elements. They shed off pieces of themselves which then manifest into Demons. Titans mimic the form of Colussi, are aggressive, and actively attack everything in sight including their own kind. Although a small number of them may allow hordes of Demons to accompany them if they both share the same elements. 

• Demons are the offspring of Titans. They mimic the form of Fiends but are only made of one Element and thus can only use magic of that one element. They are separated into Three categories. Sky Demons, Land Demons, and Sea Demons.

1. Sky Demons are Demons made up of elements of the Sky such as Light, Darkness, or Gravity. They would take the form of flying animals such as birds, bats, and flies etc. Sky Demons prefer to soar through the sky where their magic can cause the most destruction. 
2. Land Demons are Demons made up of elements of the Land such as Earth, Metal, or Fire. They would take the form of animals that would be capable of living a subterranean lifestyle such as moles, snakes, worms etc. Land Demons prefer to travel either by roaming in caverns or burrowing underground. 
3. Sea Demons are Demons made up of elements of the Sea such as Water, Electricity, or Wind. They would take the form of aquatic animals such as fish, dolphins, and Sea turtles etc. Sea Demons prefer to live in areas with large volumes of water such lakes, rivers, and the sea where their Sea magic is strongest.

For Demons to become Titans 10,000 Demons are required to merge together to form a Titan with the strongest Demons acting as the brain. A Demon's strength is determined by how volatile they are, this means the more magic their bodies contain the more powerful they are. They gain more power by either siphoning magic from the surrounding area [if it's an environment that has the same elements they have it would dramatically increase their power] or synchronize their magic with other Demons [synchronizing with Demons of same element would significantly increase their power compare to synchronizing with those of different elements] which leads to forming hordes.