If one considered only costs, benefits, gains, and losses, Chen Yang had no need to go to such great lengths and start from scratch to forge this Harmonization Dao divine ability for Chen Huai'an. He could simply have Chen Huai'an cultivate the Liuli Body, just as Xiao Yao did.
With Chen Huai'an's talent, it was not as though he could not master it. Doing so would also save considerable time and divine power, yielding the greatest return with the lowest investment.
But if he truly did that, it would be tantamount to sealing off Chen Huai'an's future path to heaven, planting a tremendous hidden danger for his eventual Treading Void great tribulation.
When Nangong Jinghe had faced the departed souls of his own descendants, he had once said that those who ascended to heaven would no longer be bound by Azure Waves' karma. This law of the Dao was equally effective for Chen Huai'an.
As long as this child could one day Tread the Void, ascend to heaven, and journey to the Upper Realm, he would be able to cast off the resentful soul nightmare that had clung to him unceasingly since birth and gain a true new life in the Dao.
Chen Yang did not wish for Chen Huai'an's path of Dao to be severed over sins that should never have been his to bear. Still less could he disregard Chen Huai'an's safety during Tribulation Crossing merely for the sake of convenience.
He hoped Chen Huai'an could walk beyond this world, walk out from beneath the shadow left by his parents, cast off the karmic debt that did not belong to him, and, beneath a broader heaven and earth, carve out a great Dao path that truly belonged to himself.
Therefore, Chen Yang was willing to spare no cost