Satan: Yoooo, son! Done with this body....want it?
Lucifer: Why would I want that, my dear overwhelmingly epicly awesome father-lord?
Satan: Because this guy totally invoked me of his own free will! It would remind me of the love this guy gave me, and with all your affection my son, it doubles my joy!
Lucifer: I WANNA PLEASE YOU DADDY!! *goes into host*
.....Why do I write such stupid things?
Possibly...hmm...
Wait....demons heal and regenerate quickly (some faster than others, obviously) - maybe Lucifer assumed he could heal the body no problem, but it ended up being in worse shape than he thought and Satan's damage was too much for him?
I should almost make a thread for Lucifer at this point >.>;;