Ye Xuan had finished setting up a protective spot then he sat down cross-legged and released his suppressed cultivation.
He opened his meridians and his energy core in the dantian started spinning at a high speed.
As it spun, it absorbed the spiritual energy in the surroundings and also the death energy trapped in the zombie bodies piling up around the building to reach him.
He was absorbing energy so fast and purifying it by circulating it several times before turning it into spiritual energy for his own use.
The zombies below were turning to dust at a fast speed, yet, he didn't rush to collect the crystal cores.
They could wait until he was done advancing.
As more and more zombies disintegrated, the zombie generals hiding within buildings began to panic.
'What was that human doing? He didn't attack, yet the zombie soldiers were dying so fast that there was already a large circle of ash surrounding the building he was on.
