The technique described in Ivor's book was a method to connect the space inside the sea of consciousness with the outside world.
The cultivator had to use his projection inside the mental sphere as a link where the "Breath" had to pass through.
However, the sea of consciousness was a personal space of the cultivator, it was his same mind, not a place appropriate to store "Breath".
But the Elemental forging method did exactly that: it forced the "Breath" of Heaven and Earth outside of their dominion and refined it through the mental energy of the cultivator, making it a form of energy that could be shaped as the cultivator wanted.
The "Breath" had its own will though, it could even oppose the advancements of the dantian, it was no wonder that it struggled to no end when it was put inside a sea of consciousness.
Of course, a failure in containing it led to a backlash.
That was precisely what was happening to Noah.
