The Redemption Water of the Holy Church also offers the possibility of transcendence to the ordinary, but its essence is to elevate the extraordinary, while Eileen's idea was diametrically opposed to it.
Not to make the ordinary extraordinary, but to let the ordinary... control the extraordinary.
His tragic end goes without saying, the most desperate end of an idealist, nothing more.
So... Ravenna believes that the original murderer and mastermind, who even wanted to kill Eileen, who was so down and out and had almost no chance of rising again, would naturally want to kill her, who not only inherited Eileen's knowledge, but also had a talent not inferior to his, and even had the support of Hydral.