And the one Su Yu initially obtained is one of the twelve Chaos Pearl transformed and shielded by the Heavenly Dao, its whereabouts unknown.
Thus, the one in his hand, even though not yet a Spiritual Treasure, has stronger essence than the two Spiritual Treasures he seized from Snake-man Celestial Immortal.
This is also why when the essence of three were activated, the two got absorbed into the one he held.
This is why the world created by his Sea Calming Pearl can give birth to a Heavenly Dao, where its Power of Heavenly Dao Origin mirrors perfectly the Power of Heavenly Dao gained during his Earth Immortal tribulation crossing.
He never considered this until today when he obtained and merged two new Sea Calming Pearls, returning to origin, and comprehended this unbelievable truth.
The Sea Calming Pearl he initially obtained is indeed one of the twelve pearls shielded by Heavenly Dao, also a part containing remnant Chaos Pearl essence.
