Obsidian Dominator, Arifureta Vol 12

She lashed out with her whip, coiling it around one of Freid’s three-headed wolves.
“Be reborn as one of my familiars—Dragon Queen’s Edict!”
Tio’s voice was filled with the majesty and power only a true ruler could muster.
“Graaaaaaaaaaaaaaaaaah!”
The bound wolf let out a pained howl. It didn’t sound like any howl a real wolf would make, and it made Freid’s hairs stand on end.
“Wh-What did you just do?!” Freid asked, shaken.
With several grotesque popping and cracking sounds, the three-headed wolf started to transform. And in the span of just three seconds, its three heads shrank into one, its entire body was covered with black scales, its tail and claws elongated, and wings sprouted from its back. It had been transformed into a black dragon.
This was another one of Tio’s new spells, Dragon Evolution. She had used spirit magic to isolate the part of her genome that made her a dragonman and now could use a combination of metamorphosis and spirit magic to implant those same genes into other creatures, turning them into dragons and her familiars at the same time.
Of course, normally, it was impossible to take control of another person’s familiar in the span of just a few seconds.
But luckily, Tio’s Obsidian Dominator could make the impossible possible.
The true purpose of her artifact was to help her more easily turn things into dragons.
Thanks to her high aptitude for metamorphosis magic and her Obsidian Dominator, Tio could forcibly convert pretty much anything into her familiar, so long as she also dragonified it.
It was a rather strange weapon for a masochist, but it at least fit the perverted part of Tio’s personality. Shea and the others had definitely given Hajime some looks when he’d presented her with the whip.
“I think I can push this a little further!” Tio shouted, swinging her whip again while Freid was still stupefied. This time, her whip split into three ends, grabbing three different monsters at once, which Tio immediately transformed.