Signing the pact in his own blood , Mephistopheles proceeds to reveal to Faustus the works and doings of the Devil .
Faustus bargains his soul to Lucifer in exchange for 24 living years where Mephistopheles is his slave .
Signing the pact in Faustus ' own blood Mephistopheles Mephistopheles proceeds to reveal Faustus Faustus the works and doings of the Devil .
Faustus bargains his soul to Lucifer in exchange for 24 living years where Mephistopheles is his slave .