Editing Paragon Path (section)

===Thuranni Shadowkiller===
An [[Eberron]]-exclusive path to those trained in stealth and with the Mark of Shadow feat (You aren't exposed if you fail to hit anyone while hidden/invisible and you gain a few rituals) so you can become a proppa assassin. ''Shadow-Fade Action'' allows you to spend an AP for a turn's worth of invisibility, ''Thuranni Silence'' allows allies around you to gain +3 to stealth if untrained, and ''Shadow Wound'' lets an attack on an enemy you have Combat Advantage over deal ongoing necrotic damage. 

You get a double-whammy in Descending Shadows, which targets both Reflex and Will and can either slow or blind based on what you hit. Shadowstep builds a small sustainable zone of darkness that blocks people's vision and lets you teleport inside it. Spectral Garrote is a fun trick in that it not only attacks an enemy but you can then grab that enemy to keep on doing damage and use them as cover for any attack against AC or Reflex.

Due to how this class keys so much off Dex, it only makes sense that you build it off a Rogue or Assassin, or possibly even a Ranger who has a thing for stealth.