well, the first one was ALMOST impossible to make, this one is IMPOSSIBLE to make !!! And it would be SO hard to play, though once you know all its possibilities would be cool.
Anyway, the part of the constitution being 0, its impossible, cause if any of your stats drop to 0 you instantly die.
For example, there is a staff of fear in nalias keep that has the chance to drain you 1 or 2 ( icant remember) charisma permanently. I didnt read this the first time i got it and Edwin died when his charisma reached 0.
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"Let my spells do the dirty work" Ertai, High Sorceror of the Holy Flame