Earth's Embrace

(Oriental Adventures, page 62, DnD 3.0)

[General]

You can crush opponents when you grapple them. This feat is called _tsuchi-do_ in Rokugan.

Prerequisite

Improved Unarmed Strike, Improved Grapple, STR 15+

Benefit

While grappling, if you pin your opponent, you deal critical damage (double normal unarmed damage) each round that you maintain the pin. You hold your opponent immobile as normal, but you must also remain completely immobile, giving opponents (other than the one you're pinning) a +4 bonus on attack rolls against you (but you are not helpless).