10 days—for 10 days, Ou Yangming was immersed in smithing pieces of equipment.
Throughout the period, he had almost attended to every Supreme Great Ancestor and had more or less conversed with each of them.
Apart from very few great ancestors, who had many concerns or lacked the strength to provide their secret techniques, the others were willing to try with their greatest skills.
Needless to say, not all abilities provided by the great ancestors were chosen by Ou Yangming because some of them could not be formed into runes. Besides, Supreme Great Ancestors from the same clan were adept in similar skills, hence only one rune could be formed in the end.
Nonetheless, even with these constraints and restrictions, by the time Ou Yangming smithed the last unique magic tool for a Supreme Great Ancestor, he had gathered more than 20 Skill Runes.
Of course, the ambitious Ou Yangming was not satisfied with the number.