Grey Knights Rules:
Nemesis Force Sword: +1 to existing invulnerable saves.
Nemesis Force Halberd: +2 initiative (yes, this makes them I6!)
Nemesis Force Stave: Grants a 2+ invulnerable save versus close combat wounds.
All NFWs have Daemonbane: ignoring eternal warrior for daemons and psykers.
Brotherhood Banner: 25 points +1 attack to all models in the unit, and automatically pass force weapon pyschic tests.
Psybolt Ammo: gives +1 Strength to Stormbolters,Hurricane bolters,Heavy bolters, Auto Cannons and Assault cannons. (not worth +20pts even on a maxed out Storm Raven)
Psycannon: S7 AP4 Assault 2, Heavy 4, Rending.
Heavy Psycannon: S7 AP4 Large Blast, Rending.
Heavy Incinerator: Operates like the Hellhound’s Inferno cannon.
Nemesis Greatsword: S:6 allowing rerolls to hit and wound.
DK Daemonhammer: S:10 Thunderhammer.
Psilencer: R:24″ S:4 AP- Heavy 6 Gatling Psilencer has the same stats excepts it’s Heavy 12. Psilencers always wounds Daemons on a roll of a 4+ unless the score required to wound would normally be less.
Thanks to http://space-wolves-grey.blogspot.com/