Death and Reincarnation

To say Percy was a little disappointed with life, would be an understatement. His girlfriend was dead, having never survived the fall to Tartarus. Percy learnt to live on in a hard way, but he never forgot her. At the very least, he had peace, right? Friends and family for support?
Nope, that would be too easy. Attacked and killed in the dead of night, Percy thought he could finally meet his girlfriend, and get at least, an afterlife of peace. As if things would be that easy. Reincarnated as a blue blob of slime, how will Percy's life change when he's no longer human? Will he be able to survive the upcoming wars? And, what's with the annoying gaming system that lives in his head?