[Alucard's instinct is to let out a low and feral snarl, because of course Carmilla would do this. He's capable of projecting composure though, God knows how he's managing it.

He takes the blood that remains in the tube, holding it up so that it can be seen. It's poured out into the little metal dish that the needle is in, and then Alucard goes into his desk. Takes out the matches he keeps in there, lights a flame.

There's some paper put into the tin for good measure, and then he adds the match. Burning blood isn't...kind...but it is effective and moreover, it can be seen.]

Give me the address. Then you leave Trevor Belmont, and don't dare communicate this way ever again. You speak to me in person. Your age makes you my elder, but you are not regent and are defying sacred laws even now.