Street Carnage (Combat)Source Ultimate Intrigue pg. 92
For you, the urban environment becomes another brutal weapon you can use to shred flesh and break bones.
Prerequisites: Str 15, Improved Bull Rush, Improved Unarmed Strike, Power Attack, Street Style, Street Sweep, base attack bonus +8 or monk level 7th.
Benefit: While using Street Style, the critical multiplier of your unarmed strikes becomes ×3, instead of ×2.