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The specter made of blood was the very soul of the Vampire Venerable, that emerged from within Ruby's body to not let Rakasha interfere with his possession.
"I finally face you, damn piece of shit!"
Rakasha's entire body was covered on Red Crimson Blood Flames, a power the Vampire Venerable has never seen before.
FLUOOOOSSSHHH!
A spiraling vortex of crimson flames hit the specter of the venerable, blasting a part of his very soul and burning it into particles of light!
BOOOOOMMM!!!
"Unnggh?! Ah…! W-What in the world?!"
The Venerable was left perplexed! Absolutely shocked!
"How come you can conjure such flames?! This is… it consumes my soul, my very blood divine power…!" Alucard cried in surprise.
"This must be a gift from her, from Ruby…" Rakasha said boldly. "She gave me her blood, and I took her powers… I have already resolved myself to stay at her side and protect her. I will become her guardian!"
Check "The Protagnist's Sister Is Actually the Strongest"!