Echani Training
Knights of the Old Republic, page 33.
You are trained in Echani unarmed fighting techniques, giving you an advantage in hand-to-hand combat.
Prerequisites: Dexterity 13, Martial Arts (I).
Benefit: You can double the damage bonus provided by your Strength bonus to unarmed attacks (minimum + 1) provided you make only one unarmed attack this turn. Once per encounter when you deal damage to a target with an unarmed attack you may make an immediate unarmed attack against the target’s Fortitude Defense as a free action; if successful you knock your opponent to the ground (prone) in their current square, provided they are one size larger than you or smaller.
Special: Targets gain a bonus to Fortitude Defense against being knocked prone based on their size: Large +5, Huge +10, Gargantuan +20, Colossal +50. Unusually stable creatures (such as those with four legs) gain a +5 bonus to their Fortitude Defense against being knocked prone as well.