The third elder looked at Wang Dong, who was full of confidence, and said, "Boy, you have to cultivate slowly by yourself recently, and when you defeat Zheng Guang and pass the entry trial, you can do the master's task in exchange for points." These points can be exchanged for items in the cultivation hall or the time in the cultivation room to improve their cultivation until they reach the realm of the Great Perfection of Qi Cultivation!"

"Wang Dong understands that external forces are not as good as his own ability!"

"Okay, the son can be taught!"

Wang Dong rested for a while, began to meditate, and slowly gathered the spiritual energy in the dantian to prepare for making a low-level mid-grade fire spirit rune.

He kept absorbing the fire aura from the outside, and slowly gathered the fire aura in the dantian, gathering more and more, and feeling that the dantian seemed to be burning.

"Rapid ......" Wang Dong burst into a shout, and the fire spiritual power continued to rush from his fingers to the rune paper, and the rune paper turned red in an instant, like a flaming red lantern.

The fire spiritual power gathered more and more on the rune paper, and the beads of sweat on Wang Dong's head kept falling, and the air was filled with a burning smell.

The rune paper could no longer withstand the impact of the fire spiritual power, and turned into a mass of burning black charcoal.

"Whew...... Failed......" Wang Dong sat on the ground and gasped.

"Do you know why?" the Third Elder looked at him with a smile on his face.

"Presumably, the rune paper can't withstand the domineering power of fire and spiritual power, so it burns. But the limit of this kind of rune paper is so much spiritual power! How did those second-order and third-order runes come out?"

"The rune paper does have a limited amount of spiritual power, so two methods are needed to solve this problem, you listen, this problem is also common to high-level runes. ”

"The first way is to change to a kind of rune paper, which is the carrier of spiritual power. However, for low-level spirit runes, there is no need for this. The second method is a general solution, which is to compress the spiritual power, as the name suggests, is to input the spiritual power into the rune paper and then compress it, and finally protect the rune paper with aura on the outer layer of the rune paper, so that the rune paper will not break. ”

"Speaking of the outer layer of the talisman paper with aura, I thought of a rare secret method, that is, a spell that can control the automatic triggering of the talisman...... This kind of spell is mostly used in traps or magic circles."

"This is the legendary timed explosion charm?......"

"Yes, this kind of explosive talisman is very common, and it is basically made by capable inner disciples and elders of our Spirit Rune Sect, but there are not many people who know the principle. ”

"Boy, listen well, the principle of this explosive talisman is to use an energy that is compatible with the spiritual power in the spirit rune, so that the two energies of them are in a short equilibrium, and when this balance is broken, it is time for the spirit rune to come into play. This requires an absolute grasp of the aura and excellent anticipatory judgment......"

"Thank you, Third Elder, Wang Dong has already understood!"

Wang Dong carefully tasted what the three elders had just said, compressed the aura, kept the balance, and did not let the aura explode.

When the fire aura in Wang Dong's dantian was stored enough, he started a new round of attempts.

The red fire spirit rune trembled in the air for a long time, the fire spirit power was constantly compressing the limit, and there was a trace of scorched smoke in the air.

"Did you fail again?" thought the third elder, and floated another piece of talisman paper on the table.

Under the action of fire spiritual power, the rune paper in the air burned red, as if it was about to burst out again.

"Hurry......" Wang Dong hurriedly attached his aura to the rune paper, suppressing the irritable fire aura.

The flames that seemed to erupt from the rune paper slowly disappeared, and Wang Dong breathed a sigh of relief, it was finally done.

The reddish rune paper landed on the table, heralding the birth of a low-level mid-grade spirit rune.

Wang Dong looked at the rune paper carefully, it was not connected with the low-level first-grade spirit rune, and the color of this rune paper was bright red, as if it was about to burn.

"Okay, that's good! You can cultivate a few more cards, and this competition will be fine!"

After resting for a while, Wang Dong said goodbye to the three elders and returned to the dormitory to rest.