**Chapter 1640: Rune-Induced Rain, Torrential Downpour**
The second rune was a high-level rune. Lin Moyu's rune's function was to induce rain, but not ordinary rain; it was rain governed by laws.
If this rune were to explode on an ordinary star, it could trigger a law-induced torrential downpour. The downpour would last for more than ten days, enough to flood a significant portion of the planet. If the planet were large enough, it could form a vast ocean.
The rune flew into the sky and exploded at the predetermined location set by Lin Moyu. The rain immediately intensified, turning from a light drizzle to moderate rain. However, it was still not enough to become a heavy downpour. After all, this was a secret realm, not an ordinary star. The secret realm was filled with the power of runes, especially ancient runes. The effect of the high-level rune was counteracted and weakened, only slightly increasing the rain.
"One isn't enough, so let's use more."
The Soul Eye continued to search the sky, and Lin Moyu's hands kept drawing runes. One high-level rune after another was drawn, flowing like water and emitting the power of water laws. The runes flew into the sky one by one, continuously exploding. The rain gradually intensified, turning from light rain to moderate rain, and then from moderate rain to heavy rain. But no matter how many runes were used, the rain couldn't intensify further.
Heavy rain was useless to Lin Moyu; he needed a torrential downpour to trigger the second stage. Looking at the clear seawater, with clusters of black water forming in the sea, Lin Moyu thought, "The heavy rain I induced and the naturally occurring heavy rain in the secret realm are essentially the same."
"My idea is correct, so where is the problem?"
"Should I use a stronger rune? I can try!"
Lin Moyu first thought of the "Source Water Rune" from the "Symbol Language," which he understood to be the culmination of water runes. The effect it would produce depended on how it was guided. After a few seconds of thought, he began to draw it. He had already mastered this rune, so drawing it wasn't difficult.
In just a few seconds, a complex and three-dimensional rune appeared in his hand. Lin Moyu then drew another rune, the Thunder Rune. The Thunder Rune was also a high-level rune. Lin Moyu connected the two runes with soul power, intending to use the Thunder Rune to trigger the power of the Source Water Rune.
The Source Water Rune contained various water laws and multiple spells. Lin Moyu couldn't predict what would happen when it was triggered. The two runes flew into the sky together.
Boom!
The Thunder Rune exploded, and thunder roared in the sky, with a lightning bolt illuminating the secret realm. The Source Water Rune was triggered, creating a spectacular scene in the sky. Water dragons roared, and a suction force arose, lifting seawater into the sky, forming a waterspout. Numerous water dragons appeared in the sky, roaring continuously.
Lin Moyu could feel the sky filled with the power of various water laws: heavy water law, weak water law, cold water law... He saw both familiar and unfamiliar water laws. "As expected of the culmination of water runes!"
Lin Moyu marveled at the sight of so many laws converging and intertwining in the sky, a rare spectacle. The water vapor in the sky and sea was absorbed by the various water laws, merging into various wondrous scenes. The rain intensified again, seemingly on the verge of turning into a torrential downpour.
Lin Moyu waited quietly, but even as the rune's power was exhausted, the torrential downpour didn't come. He frowned in thought, "Still not enough?"
"The rain did intensify, so my idea should be correct."
"It just means the power is still insufficient, but this is already the strongest water rune I can draw."
"What should I do? Should I use a formation?"
Lin Moyu pondered, and his soul showed the same expression. His soul inadvertently noticed the Refining Formation a few feet away. The Refining Formation was continuously refining the power of faith. Lin Moyu had a sudden inspiration, "The power of faith!"
"What if I inject the power of faith into the rune?"
He now harvested a hundred units of faith power daily, and with the accumulation over time, his faith power had exceeded 40,000 units. Faith power could enhance spells, so why not runes? Moreover, faith power could be integrated into runes, as evidenced by the Faith Formation.
With his thoughts clear, Lin Moyu immediately began drawing runes. The Source Water Rune was drawn again, followed by the Thunder Rune. The combination of the Thunder Rune and the Source Water Rune had proven effective, so no changes were needed. Lin Moyu then extracted faith power and injected it into the Source Water Rune.
With the infusion of faith power, the Source Water Rune became increasingly ethereal and its aura rapidly intensified. Lin Moyu didn't hold back on the faith power, pouring it in generously. The Source Water Rune became more and more ethereal until it turned completely transparent, hovering between reality and illusion. Only then did Lin Moyu stop.
The Source Water Rune had reached its limit; any more faith power might cause it to explode. The transparent and ethereal Source Water Rune, connected to the Thunder Rune, flew into the sky. The Thunder Rune exploded as before, serving as the fuse to trigger the Source Water Rune.
Boom!
Amidst the thunder, Lin Moyu felt the entire secret realm tremble violently. The ground shook, the sea surged backward, and the world seemed to turn upside down, making it hard to distinguish between sky and earth. Laws roared in the sky, and water dragons reappeared. Alongside the water dragons, brilliant star rivers appeared.
These star rivers of laws represented the ultimate manifestation of law power, belonging to the might of the Divine Sovereign. Only the power of rules from the Other Shore Realm could surpass the star rivers of laws. The ancient runes in the secret realm indeed possessed the power of rules, but they were too few to resist the power of the star rivers of laws.
Countless seawater was drawn into the sky, transforming into dragons of laws. The dragons roared, continuously striking the sky. The star rivers of laws poured down, aiding them. Boom!
The world shook again, the sky shattered, and countless black water poured down. The rain instantly intensified, turning from heavy rain to a torrential downpour without any prelude.
"The sky is leaking!"
Lin Moyu looked up at the sky and murmured. The sky was filled with countless holes, and black torrential rain poured down, turning the secret realm as black as ink. The entire secret realm was dyed black, and the rainwater invaded the soul. In this situation, ordinary cultivators could only retreat. If they didn't, they would surely die!
The next moment, Lin Moyu looked down at the island, "The torrential rain has arrived; it's your turn to appear!"
The island began to tremble, and the tremors grew stronger, as if something terrifying was awakening. Lin Moyu stood in the torrential rain, with the black rain blocked by the Golden Armor Rune. However, only the physical rain was blocked, not the essence. The torrential rain was different from before; it fell not only on the body but also on the soul.
In Lin Moyu's soul world, a torrential rain was also occurring. The rain carried immense power, trying to drag his soul into an illusion. But Lin Moyu's soul world was too strong; unless he willingly allowed it, it was impossible to succeed. Lin Moyu felt the torrential rain and murmured, "So the torrential rain is the black water."