Steve Gerber leaves the solo Satan title, and goes out with an issue that has a higher body count than I think any other Marvel book thus far. Son of Satan burns at least 20 Nihilist followers alive in this issue before killing Darklyte, their leader. This is a hardcore way to kill people, and yet nobody seems to have a problem with it.
Creators: Steve Gerber and Mike Friedrich (writers), Sal Buscema (pencils)
For the complete history of the MU, year by year, go here.