"There's no need..." Since the Blood Moon Lord had agreed to let Zhou Tian do as he wished, he had planned to use this situation to establish good relations with Zhou Tian. Moreover, the Ancient Ruins Space in question wasn't particularly valuable to him, so the Blood Moon Lord hadn't considered demanding any compensation from Zhou Tian. Thus, after observing Zhou Tian's actions, he intended to diplomatically decline any gifts.
However, when the Blood Moon Lord truly saw what Zhou Tian held in his hands, he changed his mind quickly.
Unlike Zhou Tian's emerging power, the Blood Moon Lord was an experienced ruler, somewhat knowledgeable about the Main Plane and various Ancient Ruins Spaces. Although Holy Crystals weren't widely circulated, the Blood Moon Lord recognized them immediately. To him, Holy Crystals were irresistible gifts.
