Upon watching the actions of the Head Elder a thought came to Lin Mu's mind.
"Using the Qi as the ink…" Lin Mu muttered seeing that Head Elder Heng was actually able to implement the methodology of his own Formation Dao Embryo into his.
It needed great skill and experience to be able to do this, especially considering the fact that most of the Dao Embryo's capabilities were exclusive to them.
The head elder 'wrote' runes into the sap coating and finished within five minutes. In this time, the sap had also cooled down and hardened, turning the handle glassy.
Now it looked like a glass encased wooden handle that shimmered under the flames of the Gold Blaze Dragon. is the owner.
Once the runes were fully written into the sap, a transformation change happened.
~SHUA~SHUA~SHUA~
The runes carved on the wooden handle and the ones on the coating reacted and started to link up. They glowed and soon a formation was completed in one go.
Lin Mu narrowed his eyes as he tried to identify the formation.
"What is it?" Lin Mu couldn't recognize it at all.
At first, it seemed like a shock dampening formation to him which was sometimes used on heavy weapons like hammers, or even spears to reduce the impact from using them But when Lin Mu observed it more, he figured out that its function was not exactly that.
'Guess I'll have to wait for the weapon to be completed and all the formations to be written first.' Lin Mu thought to himself.
By now, the chunk of the Snow Glass Pear sap had fully melted and it was time to close the mold. The two Head Elders glanced at the completed handle and moved to the next step.
"Insert it," Head Elder Dajian said and Head Elder Heng obliged.
The completed handle of the Axe was inserted into the mold before it was closed.
~THUD~
With the two halves of the mold closed Head Elder Heng resumed control of the Flame Soul Lamp and let Head Elder Dajian work on forging.
Head Elder Dajian tapped on the mold in a pattern, which caused changes within the sap. He did this from time to time, while the mold continued to turn in air and the yellow flames heated it.
Lin Mu wished to know what was going on inside the mold but couldn't observe it with his Immortal sense as it would disturb the two elders. But he had another option to do the same.
~SHUA~
He activated his Spatial Perception and directly saw the movements inside the mold.
'So he's using the tapping as a way to add specific grooves to the sap and also eliminate any bubbles in the sap.' Lin Mu observed.
"Switch!" Head Elder Heng handed over the control of the flames back to Head Elder Dajian who had just finished his side of the work.
Lin Mu then saw Head Elder Heng making the deepest layer of the formations within the blade of the Axe. He did this, while the flames continued to heat the mold. But by now, the heat of the flames had reduced, which led to the center of the blade to start cooling.
This was intentional as it allowed the formations to be sealed in too.
Head Elder Dajian lowered the heat of the flames bit by bit, while Head Elder Heng continued to add formations one by one. It took them an entire three hours before they finally sealed the flames.
"Open!" Head Elder Dajian pulled on the two halves of the mold.
~CLACK~
With the mold removed, the form of the Double Headed battle Axe was finally seen.
It had two crescent shaped curved edges, which narrowed around the area which fused with the handle. The handle now fully looked like part of the Axe and the runes on it were actually linked with the runes on the blade too.
On the bottom part of the handle which was thicker and meant to hold, Lin Mu saw extra Qi channeling runes too.
But this didn't mean the work was over.
Head Elder Heng used the Bone Carving Dao knife Dao Embryo and made more runes under the surface of the blade. This time Lin Mu could instantly recognize the runes, as they were one of the most common and simpler ones.
The formation that the Head Elder was making none other than the Strengthening formation. It had the most basic function of improving the strength of the person that was using it.
Of course, the increase in strength wasn't too big and it was mostly used in case of heavy weapons so that the person using it had an easier time.
The increase in strength was usually proportional to the weight of the weapon which was only useful for the weaker immortals as their own raw strength wasn't actually that high.
But Lin Mu could tell that the Head Elder wasn't adding the strength formation to the blade for that reason.
'He's only made it in a small part of the blade.' Lin Mu saw.
The space taken up by the Strengthening formation was barely five centimeters wide which left most of the blade empty. But this space was soon filled up with more formations.
And not just any formations, but the same Strengthening formations.
'He's duplicating them? But they wouldn't really help with increasing the strength anymore. It'll just result in a loss of extra immortal Qi instead.' Lin Mu tried to analyze the reasoning behind it.
Time continued to pass and the Head Elder filled the entire Axe blade with the Strengthening formations. Every single inch of it was covered with it, only leaving the edges bare.
~HONG~
And once that was done, the formations all linked up, bringing it all to the moment of culmination.
The Double Headed Battle Axe rose in the air, as strong winds started to blow. The weapon started absorbing Immortal Qi at a rapid pace, showing that the weapon was close to completion.