User blog comment:Livi-Moonfish/Fusion Gem Requests/@comment-32358770-20170724075739/@comment-32358770-20170725072005

I researched a bit and found Cobalt Aura Quartz, because black + light blue = darker blue.

It's also because of Air + Cathedral = Tanzine Aura Quartz, I thought an Aura Quartz would fit for Oni and Air too.