(From Demetrius's Perspective)
"B-Blood?" she stuttered.
"Hmm, it's just a matter of personal fascination, I suppose," I said. "I can control the blood within someone's body; like I can speed up the flow, or slow it down, or turn it off completely."
"But if you do that..."
"Yes, if I turn the flow off, they will die right away, or suffer from a heart attack," I said. "Isn't it amazing?"
"... Amazing?"
"Are you scared, my wife?"
"It's not like..."
"You are," I said, cutting her off. "Look at how your small hand is shaking. But why are you scared? Haven't I reassured you enough that I will not hurt you? You are the only person I will never hurt. I love you after all."
"Do you use this power a lot?" she asked.
[The difference between an Alpha's power and a master of the magic towers power is that an Alpha can use control one element and it's because of the power in their blood while a master of the magic tower can use multiple types of magic and it's because of the mana inside them. Demetrius can use more than one power because he has black eyes and Alpha blood. His demonic characteristics because of his black eyes worked to awaken more than one power. It's also the reason he has that unique power- controlling blood]