Psychic Maelstrom

Select an enemy unit within 18" of the psyker. Roll a D6. On a 2+, that unit suffers a mortal wound. Unless this mortal wound is negated, you can ten roll another die. On a 3+ that enemy unit suffers another mortal wound. Continue this process, adding 1 to the die roll required each time (so the next roll would need a 4+, than 5+, etc.) until you fail to cause a mortal wound, or the enemy unit is destroyed.