When firing an animus speculum, first add up the combined mastery levels of all Psyker units, friend or foe, that are within 12" of the Culexus Assassin, and pick up that many dice. You can then add up to 3 more dice to this hand by removing them from your own Warp Charge pool. The total number of dice in your hand is the number of shots the animus speculum now fires.
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