Eiro sat on the ground cross-legged. He second-stage infused his whole body with water magic again, and was currently trying to transfer the vibrations from the ground into his body as practice. He wanted to figure out good ways to increase the range of his perception of this kind.
Just due to the increase in his mental stats, that range already increased an incredible amount, but Eiro still wanted to reach further than that, with as much accuracy as absolutely possible. And so, the demon made use of any magic that he could to bring anything that could cause some sort of sensory reaction to him. The vibration of the footsteps of everyone in the house, the small bugs, rabbits or rats scattering around. The sound of everyone breathing, their blood flowing through their bodies while their hearts beat continuosly.