"We can feed the Dao Burial Ground more Ascending Treasure Qi until it becomes a top Supreme Innate Treasure," Wang Wei commented. There are only a few ways to elevate the rank of Innate Treasures; the most common is to have someone of a higher cultivation nourish it.
In the case of a Chaos Treasure, someone of Rank 11 would need to nourish it before it evolved into a Supreme Innate Treasure. Empyreans and Dao Rulers need to use the pure Grand Dao Source nourishment, but the most effective baptism is from an Earth Primarch.
"However, if we want it to evolve to the next level, we need a unique rank 12 Qi."
Wang Qi smiled wryly. "Sect master, where in Heaven will we find something like this? Instead of doing something so pointless, we might as well search for a Supreme Chaos Treasure. Although the Dao Burial Ground's primary attribute is hiding, making it perfect for a Subspace System, it may not be worth all the trouble."
