The hut fell into a deathly silence, and the burning had happened so suddenly that everyone had no time to observe the cause of the fire.

Katrina asked again, "Magic?"

"It's not like magic," Tarrant recalls the moment before the fire, his torch bursting into flames after a notebook, "is it...... Biogas?!" he looked at Rex.

Rex shook his head blankly, "Not really. ”

Kitty dipped her finger in some of the burned-out black powder, "I think it's because the diary is made of materials with combustible ingredients, which will spontaneously combust when close to high temperatures, and we call that material 'sulfone' here, which can burn even in humid environments", she is very familiar with the materials available in this forest.

"Sulfone, what's that?" Katrina hadn't heard anything like it.

"A gelatinous substance extracted from flaming red grass leaves, which burns easily and can be found in the nearby woods. ”

"Could it be ......" Katrina grabbed Kitty's hand and said excitedly, "Is that kind of plant a plant with slender blades, red throughout, and a warm feeling to the touch?!"

"Yes," Kitty nodded, "there are a lot of scorching sulfones in the nearby forests. ”

"Oh my God!" Catrina cried excitedly, "do you know what that is?"

The teammates looked at the excited mage with expressionless faces.

"That's Blazing Leaf Grass! I've seen this variety in the Institute's Plant Encyclopedia, it's very rare! Collect the powder from the sun, and when you cast fire magic, it can cause a chain of burning in the air!"

"So...... Is that a magical ingredient that enhances the effectiveness of magic?" Tarrant grinned.

"Yes! And it's rare, there is no sample of that blazing leaf grass in the research institute! It can only grow in woodland environments, and the magic materials on the market have been almost extinct in the past few years! Kitty, you must take me to see it, I want to collect some!"

"I'll take you there when I'm out", Kitty couldn't understand her excitement and agreed to her only for friendly purposes.

"Now is not the time to talk about this", Rex grabbed a handful of black dust from the table, and fine pieces of ash immediately fell between his fingers, "There's nothing in the room worth our stop, let's go." He walked out of the hut with a torch.

"Well, Katrina, we'll talk about it when we get out," Tarrant pushed the mage out of the hut.

The four of them continued in the same direction, the hut behind them was immediately hidden by the white mist, the trees around them were brushed one by one, the light of the torches gradually shrank, and it was almost burned, Tarrant asked the druid, "How far is it?"

"It should be almost there, it's central. ”

Stepping on a hard object under his feet, Tarrant lowered his head and poked down with a torch, several stones, piled up squarely, paved into a plane, this is absolutely impossible to be a natural formation, a sign of civilization, he turned back and warned: "There are stone steps below, pay attention to your step." ”

They stepped on a path paved with stones, Tarrant's torch followed the ground, walked a few meters, and reached a step down, he stabilized his center of gravity, his right foot was carefully stretched out, and he tapped on the step, very steadily, he stepped on the step, and the fire shone more steps below, "Kitty, is the temple underground?"

The druid behind him shook his head and said, "It's possible." ”

"Alright," Tarrant continued, "I hope it doesn't go too deep. ”

The steps go down one step at a time, each step is longer than the previous one, after about thirty steps, Tarrant, who walks in the middle of the steps, can no longer see the boundary position on both sides of the steps, this seems to be a design similar to a bell mouth, the exit steps are only about one meter, with the decline of the position, it is now estimated to be about ten meters long, according to this length to calculate the size of the door, it is a gate for the army to enter and exit.

The team was in an underground passage, surrounded by fog, Tarrant vaguely felt that the destination was approaching, such a wide step, with a depth of nearly five meters, was enough to build a magnificent temple, he drew his greatsword, "Guys, the temple should be in front, double queue." ”

Rex followed from behind, standing in a line with Tarrant.

After a few more steps, a heavy iron door with no edge in sight appeared in front of them.

After years of tempering, the junction between the iron gate and the ground has been corroded, but the main part still has its original appearance, with some dull colors decorating the surface, and the lower edge is engraved with strange wavy patterns.

"Is this the elven style of the 'Origins' period?" Tarrant asked his teammates for confirmation.

"Who knows, there are no archaeographers here", Catrina walked past the two warriors, stroking the pattern, covered in rust spots.

"Look for the crack in the door", Rex's torch poked in both directions, but he couldn't see the lock, "Tarrant, you go to the right, I'll go to the left, the mage is waiting here." ”

"Yes", Tarrant walked to the right, the torch sticking to the pattern on the iron door, he found nothing but rust, he looked up slightly, the height of the iron door was far beyond the range of the fire. The strange fog tightly surrounded him, Tarrant shivered behind him, looked back, he couldn't find Rex's firelight, it seemed to be isolated alone in the white fog, such a heavy fog was rare, it made people's hairs stand up, Tarrant straightened his chest and took a deep breath, and continued to move forward.

"Here!" came from behind.

Rex's voice, Tarrant turned around and walked, and about ten meters away, he saw the crack in the door, and Rex's torch was looking up and down along the crack in the door, and he didn't see the lock.

The two doors were tightly closed, and Tarrant estimated the length with reference to the distance just now, "This whole gate may be twenty meters long. ”

"Tarrant," Catrina winced, striding over, "You say, could this be a god of another race?"

"For example?" Tarrant ignored her, helping Rex search through the crack in the door.

"This gate is twenty meters long and about five meters high, and it doesn't look like a human building......"

"What race would that be?"

"Giants......" Katrina hugged her chest and stuck to Kitty.

Giant?Tarrant looked up at the iron door, if it was a giant, it was not completely impossible, the height and length of this door far exceeded the needs of human construction, but the width of the stone steps outside was suitable for the soles of human feet, it was too early to tell.

Rex's torch had searched all the distances allowed for his height, and he didn't see anything like a door lock, "Let's push it together." He leaned against the crack in the door, leaned against the left door and pushed hard, and Tarrant stepped forward against the right door and pressed hard, not moving.

Such a wide iron gate is impossible to push with the strength of one person, and Tarrant has no hope, he grabbed Rex, "There must be another way." ”

"The diary reads...... Is this it?" Kitty asked weakly in the back.

Diary, a reminder of the time, Tarrant punched the iron door, "That's right, the diary describes a door that can't be opened, and it's very close to the situation here. ”

"There's an ancient text written on it, but there's no one around here. Katrina pointed to the door.

Tarrant's torch was placed on the iron door, reflecting a faded pattern, "Is that it?" The pattern seemed to be carved in a regular manner, but the lines were too thick to be seen when standing aside.

He took a step back, and as soon as the torch left the iron gate, the light dimmed and he couldn't see clearly, "If only there were lights here." ”

Rex took out a bottle of pine oil from the spirit pattern bag, "If there is no lamp, create a zào lamp, sprinkle the oil in front of the door, and you can see it clearly when you light it", he lowered his head and sprinkled it on the ground.

After the pine oil was sprinkled from one side of the iron gate to the other, Rex's torch ignited the fuel line, and the flames flew to the ground, appearing along the pine oil to both sides, and the wall of fire rose fiercely.

Rex, who was standing in front of the door, instantly became small.

The crowd retreated in amazement, it far exceeded Tarrant's expectations, the two doors were more than thirty meters apart and nearly ten meters high, and the whole door was painted with huge and scattered patterns, arranged like words, the remains of ancient civilizations, amazing masterpieces.

The mage looked at the ancient door illuminated by the wall of fire with admiration, "Words that have never been seen before. ”

"Kitty, do you know these characters?" Tarrant scratched his forehead and asked the druids for help.

"No, I haven't seen it either. ”

"If we can't find the mechanism, we can't open this door, how did the ranger of that hut crack it?"

"That Ranger mentioned hallucinations," Rex stepped back to Tarrant's side, looking at the Iron Gate as a whole.

No signs of hallucination were found, and the firelight burned fiercely along the iron gate, and the black smoke that rose attached to the door proved that the door was real.

"Hallucination...... Hallucination...... Where's the hallucination?", Tarrant kept repeating, hoping for what clues he could find.

"Look at the words on both sides," the mage said suddenly excitedly, "it seems to be repetitive." ”

In Tarrant's opinion, there was no repetition, he compared the characters on both sides, they were different, he confirmed: "Where is the repetition?"

"Use the door crack as the center line, and the two doors close along the center line, and the characters on that door are exactly the same!"

To test the ability of abstract thinking, Tarrant took down the characters on the two door panels in his mind and placed them face to face, one by one, Catrina was right, the patterns on the two doors were symmetrical, "What period of text can be read symmetrically?"

"No," Catrina was sure, "it's not words, it's just patterns!"

Rex pointed to the top of the gate, "The diary says about the art of hallucination, could it mean that there is some kind of hallucination that prevents us from seeing the truth?"

"Is that by magic or something else?" Tarrant reached for the Tinwo badge, if it was a magical illusion, he could solve the problem.

Katrina took another step back and stepped up the stone steps, a triumphant smile hidden in her expression, "Tarrant, do you remember when we were kids when we found a strange book on the bookshelf in Culpeber?"

"What?" he didn't remember.

"There was a book that could only be opened with strange patterns, but Culpeber could look at the words that could be read. ”

"It seems to be ......"

"At the time we called it the 'Devil's Book' because there wasn't a single page of the book that we could read, but then Culpeber taught us a way," Katrina smirked, her eyes drawn to the bridge of her nose and a clown expression.

"I see!" Tarrant remembered the book, which required the reader to bring his eyes together, to squint inwardly, and when the vision was brought together, he could see the real pattern, and he tried to bring his eyes together.

The patterns on both sides of the gate gradually overlap, and the left and right reflect each other to form a three-dimensional shape, with countless faded flowers surrounding a raised downward arrow in the middle!