With this much accumulation, Gao Xuan was also advancing by leaps and bounds in Thunder Skill. He had now already visualized the Shenxiao Thunder Emperor.
He just needed endless Power of Thunder to nourish it, in order to truly temper the Shenxiao Thunder Emperor into form.
The endless Power of Thunder here was not something you could get just by triggering a Celestial Tribulation.
The Thunder Power of a Celestial Tribulation was far too violent and was not suitable to be absorbed to nurture the Thunder God Emperor.
To obtain endless Thunder Power, the simplest method was to set up a Grand Array that would draw in Spiritual Qi and continuously convert it into Thunder Power.
The range of this Grand Array had to be large enough. According to Gao Xuan's calculations, in the Primordial Celestial Realm he would need at least a territory as large as an Eastern Province to lay the array, to meet the requirements.
