Man, I wanted Yuuji to just wipe out the valley with Hellfire of Demise right then and there, but I do understand the need for discretion. His companions aren't ready to witness that amount of firepower in a singular being.
a. the names that the Maze Lord hold lose power as it is given to the new name b. the constellation loses all their power associated with their stolen name c. they become mortals again (=・ω・=)
A good question, maybe the Author will see your question and use this as an idea , I mean if we think this way is like "that time I got reincarnated as a slime" where Rimuru gives names to the monster and its drain a bit of his power
I know that's supposed to be funny, but for others who didn't understand the anti-summoning was to stop him from summoning his undead not pulling things from his spacial inventory that they had no idea he had, lols.
Now that's where I raise my eyebrows at. (● ̄(エ) ̄●)
At what?