But he thought the mana points expended weren't much.
'Their mana consumption wasn't like I expected, and can be totally sustainable in long fights without me having to worry about running out of mana. Albeit, I haven't gained complete mastery in them yet.'
A small black circle soon began to form and appeared on top of his palm, as Ainz held it, he could feel it gradually absorbing the mana and anything that got close to it, although it wasn't fast but he could tell it was gradually accelerating
Afterward, he tried the other spells simultaneously, the second one was shadow fade, however, he couldn't use it fully since he was inside the room and could only practice it for a short period of time before he stopped.
Then he tried using shadow prison, as the name implies he would have to connect his shadow to someone else, and then he would be able to immobilize them depending on his enemy's rank, it could either be a long period or momentarily.