Seekers of Arcane Lore Units from the Lorestealer Host re-roll failed To Hit and To Wound rolls of 1 when attacking Psykers, units that contain any Psykers, and units with the Brotherhood of Psykers/Sorcerers or Psychic Pilot special rule.
Empowered by Knowledge If a unit from the Lorestealer Host is within 9" of an enemy Psyker or an enemy unit with the Brotherhood of Psykers/Sorcerers or Psychic Pilot special rule at the start of their Psychic phase, add 1 to the S of all hits caused by any witchfire powers they manifest during that phase. This effect is cumulative with any Strength bonus gained form an Exalted Locus of Conjuration.