Originally Posted by
Eladrin
That's just the last sentence. I didn't want to post the whole thing yet.
It's a secondary benefit of the PrE.
The PrE focuses on defeating "unnatural" creatures - aberrations, extraplanar creatures that are not classified as 'Lawful Outsiders' (basically, anything that's extraplanar and isn't an Inevitable, Formian, Modron, or level 20 monk - it does work on devils and angels - get off my plane!), and undead.
Pure damage focus is the dark path's strength. It should be better at that. The light path is more about buffs and CC.
The Ninja will probably do more damage, but the Shintao Monk will be much better at increasing the damage of the group as a whole, or stunning creatures, with abilities like this (gained at Tier II):
Shintao Monk: Jade Strike
Cost: 10 Ki
Benefit: You perform a melee attack that is anathema to tainted creatures, that increases their physical damage vulnerability by 10% and reduces their fortification by 25%. A successful Will save negates this effect (DC = 10 + Wisdom Modifier + your monk level). This ability only functions on aberrations, extraplanar creatures that are not classified as 'Lawful Outsiders', and undead, and counts as a Light move. Creatures that are both extraplanar and either aberrations or undead receive double this effect. On critical hits, a tainted target will be locked in a tomb of jade on a failed Will save (DC = 10 + Wisdom Modifier + your monk level). Extraplanar Aberrations or Undead must succeed at two consecutive Will saves to avoid their fate.
"This set item bonus allows your unarmed attacks to bypass Good and Evil damage reduction."
The damage bonus on that set is a little unfortunate, but we're not planning on changing it.
Edit:
Additional note: For "tainted creatures" definition purposes, "Non-Lawful Outsider Extraplanar creatures" means "things that are extraplanar on Eberron" - if you follow them back to their home plane, they still count.