Knifeplay
Here is a full list of Knifeplay tricks.

Careful Strike
When reducing an opponent to fewer than 0 hp with a Sneak Attack, they can choose to leave that creature at -1 hp and stable.
Thief's Strike
When dealing Sneak Attack damage, you may also steal an item from them with a Dexterity Skillcheck.
Befuddling Strike
When dealing Sneak Attack damage, that opponent takes a -2 penalty on attack rolls against you for 1D4 rounds.
Lacerating Strike
When dealing Sneak Attack damage, inflict them with Bleed for 1D6 rounds.
Cruel Strike
When dealing Sneak Attack damage while your Anger is active, add as many additional D6 to your damage that you'd like, and take it away from your Mind.
Cathartic Strike
When dealing Sneak Attack damage while your Anger or Mood is active, you may choose to end your Anger or Mood immediately.
Piercing Strike
When dealing Sneak Attack damage, you may sacrifice any amount of Sneak Attack die damage to reduce the opponents AC by that amount. Lasts for 3 rounds.
Liberating Strike
When dealing Sneak Attack damage, gain +1 AC for the rest of the battle.
Crippling Strike
When dealing Sneak Attack damage, select a specific body part of the opponent to cripple without fail.
Shocking Strike
When dealing Sneak Attack damage, paralyze the opponent for 1D6 minutes.
Blinding Strike
When dealing Sneak Attack damage, blind the opponent for 1D6 minutes.
Whispering Strike
When dealing Sneak Attack damage, you may whisper something into the opponents ear to activate any ID skill.