Second was his 10th and possibly the second strongest skill after Blackflame, [Darkness Cutting: the user can project darkness/shadows in a way that allows him to cut through matter from a distance. Although this attack does usually slash damage, the user is able to focus it on a single piercing stab like an immaterial bullet.]
"T-This… haah… well, I can't really change it anymore. I'll bring another one even if it means I have to use more energy. And uh… about you… er… head to that world as well, I guess? Here, take this at the very least. I think this one is flawed, but even a flawed system should help you. It's the first one I created."
Reincarnated With A Glitched System: Why Is My MP Not Running Out?