Iterations
There are a total of three iterations currently available for Celestials but canonically there are four. The Cosmic body is in development and may become available in the future.
Chaos Iteration
The Chaos Iteration (Example Celestial: Basil Mortalborn) displays two sets of arms, at least one set of horns and a single, long tail. The have been known to display more than two eyes though this is uncommon. The eyes also will more likely have black instead of other coloured sclera in their eyes. While they are not inherently evil, they do have a tendency to seek out chaos in all its forms. Chasing storms, pulling pranks, meddling in mortal lives or simply destroying planets.
Death Iteration
The Death Iteration (Example Celestial: Albus Mortalborn) will always sport dragon wings-like wings with 2-5 digits and a tail that splits into two. Sometimes the split can be so far down that they appear to have two separate tails. They will also have at least one set of horns and will very rarely have more than one set of eyes. They do not always need a Life counter part in fact most of them do not and simply exist on their own.
Life Iteration
The Life Iteration (Example Celestial: Oso Starborn), like the others, will always have at least one set of horns. Their wings are always feathered and will have a single, broad tail. This is to aid in flight. Their tails are more likely to have a furry crest as well as the crest down their back. Like their Death counter parts, they do not need a Death iteration to keep balance in their power.