Choke Hold

(Oriental Adventures, page 61, DnD 3.0)

[General]

You have learned the correct way to apply pressure to render an opponent unconscious.

Prerequisite

Improved Unarmed Strike, Improved Grapple, Stunning Fist

Benefit

If you pin your opponent while grappling and maintain the pin for 1 full round, at the end of the round your opponent must make a Fortitude saving throw (DC 10 + 1/2 your level + your Wisdom modifier). If the saving throw fails, your opponent falls unconscious for 1d3 rounds.