This is Prince Jhon in his Second Evolved state, because during there life, they go through three stages.
The inspirations I got for making this form is basing it on a feline species, since the Nuran is mostly feline, however, at a time in their past, they evolved so much that couldn't anymore, so they went to look for ways to evolve.
The Nuran arrived at the Sol System during the Cambrian Era of our history and studied the animals, they then took samples of Trilobite and Wiwaxia back to their home world.
After a series of experimental tests, they than began to add Trilobite and Wiwaxia DNA to there own.
However, numbers of Nuran didn't want this addition to there bodies and left Nuran and the system.
While another group stated that cybernetics was the way forward and also left Nuran.
The remaining Nuran became stronger, faster, more intelligent and more evolved due to advancements in technology and there own bodies.
The addition of Trilobite DNA added an exoskeleton to there backs (Which you can see on the pic) and the addition of more powerful eyes.
While the Wiwaxia added spikes to there heads and odd smaller spikes on there arms and legs (Also seen in pic.)
Jhon's reason for not showing this form for so long is that he forgot it.
(Also someone... wanted me to draw his... umm... manhood in this pic..., but in the end I couldn't.)
(For his Third Stage of Evolution, his Mobian form and his Bio go here: [link]