Battle Bunnies have done a quick overview of the Talons Of The Emperor from Inferno. http://battlebunnies.blogspot.co.uk/2017/02/inferno-overview-talons-of-emperor.html They quickly cover the Legio Custodes, including the different types of spear they can carry. Go a little more in-depth on the Sisters of Silence. Then there's the Ordo Sinister. Unlike the previous Lore, the Sinister appears to be most if not all Warlord Titans which the Emperor requested of the Mechanicum and then he modified to be psyker-powered and piloted by psychic blanks. They have access to the usual Warlord range of weapons, as well as special esoteric weapons from the Emperor's own armoury, plus they project an unnatural aura and use psychic abilities of a Titan-scale.