Except for the different quality of the light, the two Forgotten Keys, which were identical to each other, began to slowly melt and merge with each other after touching each other.

It didn't take long for a key of oblivion, which emitted a dark golden light, to float in front of Song Jian and was gently held in his hand.

After looking at it carefully for a long time, Song Jian frowned slightly: "I can't see any difference between this and the previous one!" ”

The attributes of the Forgotten Key have not changed much, and even the quality is still dark gold, as if it has directly swallowed the black quality Forgotten Key.

System: You have obtained the Forgotten Key after the fusion, do you want to start the hidden quest "Trial of the Demon Suppression Tower"?

Seeing this system information, Song Jian was shocked: "Demon Suppression Tower, it turns out that the Demon Suppression Tower needs the Forgotten Key to be accessed?" ”

Song Jian suddenly thought that the little girl who had let go of herself and asked herself to come to the Ancient Sword Star to find the Demon Suppression Tower, did she sense that she had a forgotten key in her parcel bar?

Thinking of this, Song Jian didn't dare to be careless, and after hesitating for a long time, he still chose to accept it!

System: You have received the hidden quest "Trial of the Demon Suppression Tower", have you consumed a Forgotten Key to open the entrance to the Demon Suppression Tower?

"What, to consume a key of oblivion?" Song Jian looked at the Forgotten Key that had just been fused in his hand, and a look of embarrassment appeared on his face.

You know, this key to forgetting is a master key, if you lose it, if you encounter a locked treasure chest in the future, Song Jian will not be able to open it, and the loss is still very large, which makes Song Jian hesitate.

After thinking about it for a long time, Song Jian gritted his teeth and chose to be sure, the key of forgetting that he had just obtained in his hand suddenly disappeared slowly, and in his place, a small red dot suddenly appeared in front of Song Jian.

This small red dot rotated rapidly, and while rotating, it continued to expand, and the edge rotated, constantly sprinkling countless points of light similar to Mars around, and after a while, a stable red portal appeared in front of Song Jian.

"W-what is this?" Song Jian looked at the deep portal, and couldn't see what was behind the portal at all, only pitch black.

System: You have ten seconds left to enter the Demon Suppression Tower! Ten, Nine, Eight,......

Looking at the countdown that appeared in front of him, Song Jian was stunned, and hurriedly stepped into the crimson teleportation light door in the last three seconds!

After entering the light gate, it was dark in front of him, and when he turned to look, the teleportation light door behind him was rapidly shrinking, and finally turned into a red dot and disappeared.

Open the quest bar, and the content of the "Trial of the Demon Suppression Tower" quest has also changed, the quest content: Find the Holy Light Priest Situ Kath in the sin cage, and learn the secrets of the Demon Suppression Tower from her!

"The Cage of Sin?" Song Jian looked at the map in the taskbar, it was pitch black, there was nothing, and there was not even a mark of where the sin prison was, how could he find it?

Opening his eyebrows, the surrounding environment suddenly became clear, and Song Jian found that he was actually in an underground prison, surrounded by tall iron cages, and the rows of iron cages were surrounded by horizontal and vertical stone paths, each stone path was only more than two meters wide, and it was full of black and brown stains.

"Demon Tower, Demon Tower, is this the cage where demons are imprisoned?" Song Jian looked at the iron fence around him and said secretly in his heart.

Some of these iron fences are intact, some have been damaged, the steel fences with the thickness of the arms have been torn apart, and some of the fences still have the corpses of monsters that have been dried.

Song Jian cautiously probed along the passage, he didn't believe that all the monsters in it had been killed or escaped.

As Song Jian walked, his movement trajectory slowly appeared on the mission map, as long as he walked through, the map was revealed, and the rest of the places that he had not walked were still dark.

"Now you need to explore all the maps here......" Song Jian said secretly in his heart.

At this moment, in a cage next to him, a furry arm suddenly stretched out and grabbed towards Song Jian, Song Jian instinctively waved the Sky Breaking Sword, slashed sideways, and directly cut off this arm, and suddenly a painful roar sounded from the iron fence, and this hairy arm was cut off and fell to the ground.

Song Jian glanced inside the iron fence, and a humanoid creature, covering the wound on his arm, staggered backwards, and soon disappeared into the darkness.

Glancing at the information bar, Song Jian frowned slightly: "A thirty-sixth-level monster, how can there be such a low-level monster here?" ”

You know, although he has never been to the Demon Suppression Tower, he still knows the legend of the Demon Suppression Tower in great detail, after all, entering the Ancient Sword Star, the Imperial Sword Sect, one of his most important tasks is to find the Demon Suppression Tower for that little girl!

"The Demon Suppression Tower is all imprisoned in the powerful big demons, and at least one hundred or more, the strength of the dominant-level boss is qualified to be suppressed here, otherwise, just destroy them directly, why waste time and energy to suppress them here?" Song Jian muttered to himself.

Song Jian guessed that the role of the Demon Suppression Tower, perhaps the same as his Sword Qi Stone Tower, needed to use these big demons to gain some benefits, otherwise, why suppress these monsters instead of killing them directly?

There were bursts of painful roars from inside the iron cage, and the sound suddenly made the surroundings weird, and there were bursts of wheezing, rubbing, and low roars all around, as if something was beginning to wake up, and even attracted by the movement here.

Song Jian's heart moved, and he cast the sword shadow clone, and suddenly a figure identical to him appeared next to him, under his control, the sword shadow clone casually chose a passage and ran forward quickly, and the mission map began to be revealed.

However, after a while, the sword shadow clone stopped and began to lose blood rapidly, and in less than a minute, Song Jian lost contact with the sword shadow clone.

This made Song Jian feel shocked, you must know that his current sword shadow clone skill has reached level ten, although he has not yet reached the full level, but the strength of the clone is almost the same as him.

"Is there such a powerful monster in here?" Thinking of this, Song Jian hurriedly performed the concealment technique that came with the concealment necklace, and the figure slowly disappeared in place.

After a while, a large group of translucent, gray-covered ghost-like monsters floated over, they were like a cloud of gray mist, stopping around Song Jian's location before, and then seemed to be attracted by the monster that kept wailing, and directly passed through the iron fence and rushed towards the monster of more than thirty levels.

After a while, a terrible scream sounded in the iron cage, and soon, the scream became smaller and quieter, and finally became silent.

Soon, these ghost-like monsters floated out of the iron cage, and the original gray-white translucent ghosts flashed with a faint scarlet light in their bodies.

After these ghosts floated out of the iron cage, they seemed to have lost interest in exploring the surroundings, and directly chose a random passage and floated forward slowly.

"A hundred-level lord-level boss, devouring ghosts, how can there be such a terrifying monster here?" Song Jian hid to the side, carefully casting his eye of insight to observe the attributes of these ghosts.

……