WH40k GreyKnight v HoundofMorkai

"The Wolfspear also make frequent use of the psyker-hunting packs known as "Hounds of Morkai." Marked beneath their Phobos armour with powerful runes of warding, these specialist killers are a formidable threat to enemy Warp-wielders, and their chilling presence has been known to reduce their psychic quarry to whimpering wretches even before their knives and pistols complete the kill."
https://warhammer40k.fandom.com/wiki/Wolfspear#Rune_Priests_and_Hounds_of_Morkai