[MOD] Assassin Backstab/Critical Bonus Effects

This mod is meant to provide the assassin with a more useful backstab, but not through simply improving their modifier. After all, a trained assassin should know more ways to cripple their opponent than simply stabbing them in the gut. With this mod, an assassin will have significantly more options for crippling their opponents. Cut their hamstrings? Sure. Aim for a mage's throat? Go ahead. Pierce an artery and make them bleed out? Why not?

With this mod installed, the assassin gains a special ability which allows them to enhance their backstabs with one of the following effects:

• Paralysis: Target must save vs. death at +2 or become paralyzed for 2 rounds.
  
• Hamstring: Target must save vs. death or have their movement rate and Dexterity halved for 3 rounds.
  
• Bleeding: Target must save vs. death at +2 or suffer 1d4+1 piercing damage every round for 2 rounds + 1 round/6 levels.
  
• Cutthroat: Target must save vs. death or be silenced for 5 rounds.
  
• Lethal (Level 18+): Target must save vs. death at +4 or be slain instantly.
  

The assassin may not have more than one bonus effect active at once.

Save modifiers decrease by 1 per 6 levels of the assassin. Additionally, the assassin will become invisible for 1 round after landing a critical hit, which is meant for more opportunities to backstab in the midst of battle instead of resorting to hit and run.

As long as you install this after any mods that affect the assassin, it should be compatible with mods that alter the assassin kit... hopefully. I use Rogue Rebalancing and it doesn't cause any noticeable issues (although it may be too strong in conjunction with RR at higher levels, can't say yet)

Currently known issues:
- Backstab/critical bonuses aren't displayed on the kit description. Not sure if I can do much about this, as any addition I write will override or be overridden by other mods.