Got my Empty Sky Slash V's level maxed out on my Earth Spirit Sword, and Momo was able to evolve it to Spirit Empty Sky Slash. HOWEVER, the very same skill, with the same rank and level, on my Neo Excalibur, is not evolvable.

Worst part is my NE is far superior to my ESS, and at lvl 90, it's a far better option.

Momo, you suck.

Lol RNG hates you. Welp I get the same issue too. At least you found a rank V skill that can be evolved. I'd love to have triple fireballs rank V, VI and VII

I sure hope my Holy Pillar VI is evolvable, but knowing my luck, it won't be.