The final realm in the Art of Cultivation is to achieve a balance of Yin and Yang.

The daytime was considered the time of Yang in the Yin and Yang Geomancy.

The sun shone brightly during the daytime. The blazing sun was considered a type of Yang energy.

Donoghue naturally would not be able to control it well when using the Sky Breaking Axe during the daytime as it would absorb too much Yang energy.

However, all things would be put to rest by night as the Earth would be filled with Yin energy