check out Surprising Riposte feat pg. 52. Drow of the Underdark
If you deal damage to an opponent in the same
round that you successfully feinted against it, it becomes fl atfooted.
This effect lasts 1 round or until the opponent’s next
turn, whichever comes fi rst.
Opponents that can’t be caught fl at-footed, such as characters
who have uncanny dodge, cannot be affected by Surprising
Demonic Sneak Attack feat pg 85 Fiendish Codex 1
DEMONIC SNEAK ATTACK
You know exactly how to twist the blade to get the most out
of your sneak attacks.
Prerequisite: Sneak attack class feature.
Benefi t: When you make a successful sneak attack, you
can reroll a number of sneak attack damage dice equal to the
number of Abyssal heritor feats you possess. You must take
the results of the rerolled dice.
Special: You trade feints for fi nesse and fi nd it diffi cult
to hide your more malicious intentions; consequently, you
take a –2 penalty on Bluff checks.
Deadly Precision [General]
You empty your mind of all distracting emotion, becoming an instrument of deadly precision.
Dex 15, base attack bonus +5.
You have deadly accuracy with your sneak attacks. You can reroll any result of 1 on your sneak attack’s extra damage dice. You must keep the result of the reroll, even if it is another 1.