Acid rain

"There, I can see a spirit there." Treevor pointed to the orc spirit, who was at the edge of the forest without entering. He had green skin like the other orcs, but it was a light green more like tree leaves, rather than the dark green of the orcs.

"Why is his skin green? Shouldn't it be translucent like his spirit was before?" Athos asked curiously.

"I don't know. Maybe it's a characteristic of all spirits and I'm the only one that's translucent, or maybe this spirit is different for some reason. I have no way of knowing and it doesn't make much difference in the end." Treevor responded with a disinterested shrug.

'Hey, is that a slime spirit? Why would a spirit assume the form of a slime?' Emilia who was also scouring the enemy army asked for the mental link, catching the attention of Athos and Treevor.

Treevor shrugged, thinking they all had their quirks and oddities.