Scorn of Sorcery

Like the deity they worship, the warriors of the Blood
God despise psykers, and their sheer hatred can quell
the sorceries of foes.
Use this Stratagem in your opponent's Psychic
phase, after a Psychic test is passed for an enemy
Psyker unit and after any Deny the Witch test is
taken. If that enemy Psiker unit is within 24" of
any Traitoris Astartes Khorne units from your
army, roll one D6: on a 4+, that psychic power
is denied.