D&D 3.5 Scorpion Style, Feat - New

Shadow d20

Scorpion Style(Fighter, Monk(1st,2nd,6th))

You can perform an unarmed strike that greatly hampers your target's movement.

Prerequisite: Improved Unarmed Strike.

Benefit: Make a single unarmed attack as a standard action. If the attack hits, you deal damage normally and the target's base land speed is reduced to 5 feet for a number of rounds equal to your Wisdom modifier unless it makes a Fortitude saving throw (DC 10 + 1/2 your character level + your Wis modifier).

Special: A monk can select this as a bonus feat at 1st, 2nd or 6th level, in addition to the normal options available at those levels. A monk need not have any of the prerequisites normally required for these feats to select them.