Deathskulls: Maniacal Seizure

Maniacal Seizure has a warp charge value of 7. If manifested, select one enemy unit within 18" of this psyker. Until the start of your next Psychic phase, when resolving an attack made by that unit, subtract 1 from the hit roll, and when resolving an attack made by a friendly DEATHSKULLS model against that unit, improve the Armour Penetration characteristic of the weapon by 1 for that attack (e.g. AP -2 becomes AP -3).