Spyro awoken the true power of a Purple Dragon with Pure Aether. He's using both Light Aether and Dark Aether.

Also, this form's colors were inspired by Legendary Spyro's colors in Skylanders. http://spyro.wikia.com/wiki/Spyro_(.....egendary_Spyro

As for terms of power, it's a mixture of Dark Aether and Light Aether. He's got the cold, brutality and power of his Dark form and the Master and control of the Elements of his Light form. His speed and power have increased past their peaks. He also won't attack indiscriminately because he has full control of his power and emotions.