Projection of Purity

Roll 2 D6. If the result is greater than the
Converted Mana Cost, target enemy unit within
12 inches cannot be affected by any aura abilities
of models in its own army until your next psychic
phase
"The psyker projects his piercing gaze and purifying
wards, cutting maleficent servants off from corruptive
influence and revealing the true weakness of his foes"
-Grey Knights, Datacards