In your Shooting phase, when a friendly HERETIC ASTARTES PSYKER unit (excluding DAEMON units) is selected to shoot, if that unit makes a Dark Pact, that unit’s ranged attacks have +1 S.
In the Fight phase, when a friendly HERETIC ASTARTES DAEMON PRINCE/DAEMON PRINCE WITH WINGS unit (excluding KHORNE units) is selected to fight, if that unit makes a Dark Pact, that unit’s melee attacks have:
+2 S.
+1 AP.
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