Actually, Lin Li had been somewhat worried at the start—worried that he would need to expend a lot of effort before he could find out the truth from this warrior leader—but he had not expected that Sendros would give him a surprise. He immediately used the cruelest and bloodiest Thousand Soul Spell and scared that poor Warrior until he went mad.
The Warrior's psychological defenses were totally crushed, and interrogation became much easier. Lin Li did not even use much effort, and already managed to get the information he wanted.
The Warrior answered while trembling with fear, yet Lin Li whispered a "thank you" to Sendros.