Not only those monster soldiers, even the Blood Plunderers were caught off guard, stunned for a moment, until the attackers launched a raid. Only then did they let out a roar, charging at the enemy while spreading their Blood Cloaks to completely envelop the nearby monster soldiers, preparing to transform them into Blood Berserkers.
They hadn't done this before because Blood Berserkers cannot control themselves. If they transformed without enemies around, they would start attacking each other until only one remained.
Their techniques were no different from the other Blood Plunderers; being merely quickly produced defects from the same mold, they couldn't come up with any new tricks.
And all these have already been completely grasped by the Conqueror Army, not giving them any chance to prepare. Lightnings and Chain Lightning rained down intensely, targeting the area densest with Blood Plunderers.