Only one thing was stopping Max from shifting to the Dualbloom form, and that was the fact that he knew how Dr Nelson was keenly waiting for him to do so. If he really did shift, then he was only giving the dirty scientist an opening to conduct experiments on his Blood Fiend, Antaf.
He wasn't ready for that, not until he was not a Vampire Slave.
Is that day coming?
The day that he wouldn't be a Vampire Slave?
'My urgency is only natural, Antaf. I need someone to speak with, just anyone, so that we can exchange ideas and to make the right decision.'
The Blood Fiend to his usual traits could have made another joke but heading how serious was Max, he restrained from doing so. Not always should he be joking with his client, right?
[ Antaf: "It has to do with how you are going to escape from here, I am sure." ]