Could it be Senior White Two's doing?
In addition to his own set of life-bound magical treasures, Song Shuhang had also made a set for Senior White Two, which resulted in the Holy Sword of the End.
Just now, after he asked Senior White for help, was it him who sent the puppet maiden over? After that, was it Senior White Two who had sent over the other set of the Thirty-Three Divine Beasts' Combined Magical Treasure?
This would make a lot of sense.
Song Shuhang stretched out his hand, and one set of the Combined Magical Treasure returned into his body.
At the same time, his second golden core's composition experienced another change—the golden armored warrior quietly returned to Song Shuhang's Golden Core Composition after having left its All-Destroying Giant state.