Elmenhilde's strength

Indeed, what she just drank was my blood. Hosting the power of the infinite and the dream within it, my blood—.  Vampires could trigger a variety of different abilities when they drank blood, and my blood was not something that could be compared to any ordinary stimulant. Although Elmenhilde was from a family of high-class aristocratic Vampires with historical roots, she wasn’t particularly superior in terms of the abilities of normal high-class Vampires. In other words, she was quite ordinary as a pure-blood. However, as a True Ancestor of Carmilla, her ancestry did not betray her—. Only in this was she extraordinary and prominent. That is — so long as she drank someone’s blood, she was able to invoke their abilities. By drinking Ravel’s blood, she was temporarily able to use the flames of immortality. By drinking my blood — she was able to use the Sekiryuutei’s aura to wield the tremendous power of a dragon. It seemed as though all of Elmenhilde’s fatigue disappeared as she released an enormous ball of aura, while the large spear of light that Mirana-san threw from a long distance was easily deflected. The immense pressure made it impossible for any of the reincarnated Angels to get close. —If you’re going to pass, then now’s the time! I gave instructions to Elmenhilde.

Volume 23, Life.Youth