Di Jiu knew that he could not let his Spiritual Sea shatter totally, or he would die for sure. He also did not count on the Small Gray Stone in the Spiritual Sea, as he could not ask it to do anything. The only thing he could depend on was the Forging Spiritual Art.
The Forging Spiritual Art circulated furiously, drawing out waves after waves of cooling aura from the Spirit Baptism Pith. This aura worked very hard to prevent the Spiritual Sea from shattering even more, all the while repairing his Spiritual Sea.
The aura squeezed out of the Spirit Baptism Pith through the Forging Spiritual Art could indeed slowly repair the cracks in Di Jiu's Spiritual Sea. However, the speed of reparation was way slower than the speed at which it was shattering.
Di Jiu could only use the Qi Circulation of the Galaxy Art to draw out the terrifying burning aura and transfer it to the galaxy meridian network.