ph0rk
Friendship is Magic, and Magic is Heresy.
Yep, if you go back to some of the source material death was far more certain.Also one often ignored anti-death spell is Clone. I don't know why liches exist if this is possible... Its rather creepy and cool in its own right though but it simply is a death immunity in effect.
Of course, wizards also tended to only be able to memorize 4-5 spells, magical items expired after use, etc.