Ability drain

[jellyfish21]

With ability draining weapons, how low can a mobs stat get?

[Aristalla]

I believe 0, but I'm no expert.

[Depravity]

Stats can be dropped to 0 on orange names and down.
Red/purple named enemies have a cap of 10 points of damage that can be done to any individual stat - although some of the stat penalty effects like exhaustion can take that farther.

If a stat is dropped to 0:
Mob goes into autocrit mode - every swing that is not a roll of 1 hits and crits
Casters stop casting (tip: beholders have a str of 10)
If it's constitution, mob is stunned for 6 seconds in addition to autocrit - this was changed from PnP rules due to high level being all about the con 0 autokill for some time prior to EU.