Two Mystics have Merged. Basically how Merging works is that the souls of 2 Mystics escape their bodies and mix together which creates the result, Beasts. This one shown here is Ariluphius, the most stable beast. The hosts work well together so it can stay in this realm as long as it wishes. If you know who it's hosts are then you win a free quality rated request! (if you don't know what that is then check my "truths & lies, Leviathan" to learn about it