King Ars Primer+Free Or Non Actions+Lifeblood_Scourge

Lifeblood Scourge (Su): A sovereign’s lifeblood resonance empowers his own attacks against those under his rule. The first time in each round the sovereign hits a creature in his collective with a weapon attack from within 30 feet of his target, that creature takes his lifeblood resonance damage in addition to the attack. At 8th level, the sovereign can apply this extra damage to up to two attacks each round. At 15th level, the sovereign can apply this damage to up to three attacks each round.