Holocaust (20 points)
The psyker projects forth the fire in his soul in a searing ball of white flame, igniting the very air around him, incinerating any who come too close.
Holocaust is a psychic power that may be used in the Daemonhunters' Assault phase, at an effective Initiative of 1. If the Psychic test is passed, place the Ordnance template anywhere in contact with the psyker (or the Brother-Captain in the case of a unit of Terminators). All models, friend or foe, under the template suffer a Strength 5 hit with armour saves taken as normal. Those partially under the template take a hit on a dice roll of a 4+. If a Grey Knight Terminator Squad uses this power and suffers a Perils of the Warp attack it will affect every member of the squad at the same Strength value. Any and all wounds inflicted by this power count towards the combat result.
Errata — Chapter Approved: Codex: Daemonhunters Q&A (v1.0): If a Grey Knight Terminator retinue with Holocaust accompanies a Grey Knight Hero who also has Holocaust, both may select it as a unit upgrade — potentially using Holocaust twice in the same turn, at a price. Declare which of them is using the power before rolling: if the Hero is using his own power and suffers a Perils of the Warp result, only he takes the hit; if he's acting as a conduit for the retinue's power, the whole squad takes it.