Now then, unfortunately I couldn't employ the spirits at all.
I had expected it already, just like with magic, I couldn't chant the spirit employment well too.
Due to careless mistake of Aialize-san who tried to show an example, I had gotten soaked together with Lua-san, but I didn't have any complaint since I obtained spirit magic skill at that time. Aialize-san who was disheartened from Lua-san's scolding was adorable.
"That reminds me, how do the changing of spirit light strength work?"
"I wonder?"
"Wait, Aze-sama."
Lua-san makes a retort to Aialize-san who tilts her head while putting her finger on her cheek. Lua-san explained.
"In case with people, it's not because of the difference in mana pools, in truth, we don't know much about it. In case with the earth veins, the location with thick flow emits stronger light. The area around the source especially shines intensely."
"That's right. If I'm not mistaken, yes, there's a source on the basin of the waterfall here."
Eh?!
I involuntarily drop my line of sight after hearing Aialize-san's words. When I activate spirit seer skill, there's really light leaking from the waterfall basin.
The light isn't that strong even though the water isn't muddy.
"There are all sort of sources after all."
Lua-san came out with follow-up-like words as she seemingly saw my disappointed expression.
"Now that you mention it, what are sources?"
"I guess they're the holes where the earth veins gush out?"
"That's right, there are more than 100 of them on this continent, and among them, the scale of the one on the dragon valley is extraordinary. We don't quite know the total number of sources that are as small as this waterfall basin one."
The source of dragon valley huh, I'm positive that I've ruled over it. The cause of my spirit light might have been that unexpectedly. According to Lua-san, there are many things that are built on top of sources, like cities or labyrinths. The small sources become the dwellings of monsters or mythical beasts, or get to have some magician build a tower on it.
Fumu, judging from this story, the maze of Trazayuya should have been built on top of a source, but I didn't get to rule it like with the dragon valley. I wonder if there's a limit of being only able to rule one source?
I watched the world tree behind me with spirit seer since It caught my attention.
The body of the tree is shining dazzlingly. Moreover, when I strain my eyes, I can see concentric circles of light rings spreading like ripples around the tree branches.
"Isn't it beautiful?"
"Yes, very much so. Is that world tree a source too?"
"No, it's different--"
"Aze-sama."
"--, that's not from the earth veins, but from the void, err, I wasn't supposed to say it was I?"
"Well, I don't mind if it's Satou-san, but please don't spread it to the outside world okay."
I nod to Lua-san. Aialize-san who has confirmed that continues speaking.
"Do you know that there are ether flowing in the void?"
"I'm sorry, I'm ignorant."
"Ara, you can just study if you don't know. Ether is--"
Aialize-san proudly explained about ether, but when she was explaining the fifth element after the four primary, earth, water, fire and wind elements, she cut the complicated talk in one stroke, and so, in short, the intermediary substances in the outer space are massive amount of mana that have been blown.