[@Aristocles]
Daniel Sighs 
"The Dark Spell The note refers to is a spell that enables me to turn into a Lich. I Drained life from my parents and Alicia to gain power to slowly transform me. When My potion runs out and the blessings time's is over than I will turn into an undead abomination. I won't die unless something kills me. When we kill Warren he may have a cure of sorts. Something to help maybe. I have one month before The transition starts. Two months until the transition is done from when it starts. I know it's hopeless but I have to try."
He pauses for a second to take a breath and says
"He's also started the transition about the same time I did, so we have a similar timeframe to defeat him too"