Honestly, there are so many creatures I can’t list them all, and hardly any have actually made it into the story yet. Here are the ones that have.
Elemental giants
These are creatures made out of the corresponding elements controlled by the elventi. They only exist in part two of book one.
Unnamed ugly creature
This creature has only made a brief appearance, and I don’t even know exactly what it looks like. It lives on Egecos.