Tzeentch's Firestorm

Witchfire. Tzeentch's firestorm has a warp charge value of {6}. If manifested, select one enemy unit within 18"and visible to the PSYKER and roll 9D6. For each roll of 6,
that enemy unit suffers 1 MV. If the result
of the Psychic test was an unmodified {9}+, that enemy unit suffers 1 MW for each roll of 5+ instead.