Soukyuu no Ariadne - Vol. 9 Ch. 80 - The Power to Defeat Them

[MangaDex]

 

[Randall1337]

The only person lacile is willing to kill is himself... Let's see if he can hold himself to that

 

[RC1138Boss]

Self sacrifice it its...

 

[RaikohZX]

Well it's nice that for once it's not so much the protagonist pulling a new power out of their ass, as realizing other people can do what he's doing but better and thus move to learn from that.