The question got a pause and a slight smirk to his face. He wondered if this was some kind of test, since Magneto had already begun this little meeting by using his birth given name. Then it dawned on him what he was referring to. He watched the man for a second, hearing the song of his blood, feeling his adrenaline, the slightest hint of fear pumping through his veins, the rhythm of his heart speeding up. Knowing what a person was thinking was beyond his comprehension, yet certain emotions he could read by the blood itself. Realizing he made the man nervous brought a certain amount of pleasure to his voice, but he knew not to mock this man either.
“Some know me already as the Red Death, but I would put that title behind me for the time being. Call me… Sanguine.” He smiled pleasantly and faced him directly, hoping to put him at ease.
“Care for a drink?” He indicated to the basin of blood on the table in jest.