A Beast's Authority born from the animals slaughtered by the weapons of Humanity. As they have been killed by them more than anyone else, this skill allows the user to wield the inventions and weapons created by mankind better than anyone else. However, although still deadly, the skill becomes less effective against Heroic Spirits, especially those who are closer to nature like Dobrynya Nikitich. Koyanskaya is also able to extend this Authority to her War-beasts, as they are created from her Reality Marble and thus are part of herself. Nikitich empowered by a Command Spell was able to kill 999 War-beasts with Berza Damask. Although the war-beast's bullets shattered Nikitich's Noble Phantasm, her Conceptual Armor, in an instant, she survived thanks to her higher tolerance to Nega-Weapon. While Koyanskaya's power was halved against her, she was greatly injured, and Nikitich said that even with the support of another Command Spell she wouldn't be able to pull it off a second time.[1]
The Nega Skill she had when she was a Larval Beast. It currently falls under the "Aptitude for Slaughter (Gun)" label so she can show off how she's not a Beast anymore.[2]
