Seeing this, the story on the mural is obviously not over, but there are only these eight huge murals around the hall, and there are no more clues.

"Could there be a secret door that we haven't found?" Phil reached out and tapped on the mural, but unfortunately everywhere his fingers could reach, it was all solid rock.

Everyone looked around and found nothing. Just when she was at a loss, Thea, who had been lying on the iron boat, suddenly said, "Don't you people look up?"

When people are standing and walking normally, the downward perspective is often larger than that upward, which is actually quite reasonable. After all, if you look up, not only will you occasionally eat bird droppings, but you can also easily fall into the pit.

Therefore, everyone, even Crete, who had the best eyesight, only glanced at the arc-shaped dome as they entered the hall, and made sure that there was no danger, and then stopped paying no attention to it. Instead, Thea, who was lying on her back on the boat, stared at the roof for a long time, and finally noticed the difference on it.

The silver dragon's eyesight in the dark was not inferior to that of the elves, but Thea lay groggily, occasionally opening her eyes to take a look, and did not realize from the beginning that the small mottled lines exposed on the dome were the same murals as the surroundings. It wasn't until she was distraught by the sound of Lukka reading the words, and looked up for a fight, that she saw the looming patterns on the dome.

Lukka heard Thea's reminder and looked up, but the range of the glass lantern was so small that human vision could not see the details of the dome in the dark.

"This roof is more than twenty meters high, isn't it? We didn't bring a ladder with us, so we couldn't see clearly. Phil said.

Lukka suddenly remembered the fairy tale of Jack climbing up to the clouds along the pea seedlings, and turned to Dolan and said, "Can you turn into a plant and grow near the roof?"

Dolan nodded: "Yes, as long as there is enough sunlight and water, plus a little fertile black soil, it will only take me two weeks to grow to a height of twenty meters." ”

"Where are we going to find those things for you!" Lukka had to think of something else.

"I remember there used to be a vision gem that I could fly with my mouth shut and send the picture to the mirror. Ollie remembered it.

"I remember, too, but you'll have to ask shut up if it can flip over and fly belly up. Lukka sighed.

The gem was attached to several silver chains, and when it was tied to Shut Up, it was located on its chest. This design is very much in line with the characteristics of shutting up and scouting in the air, but now the things that need to be seen clearly are on it, which obviously doesn't work well. If you put the gem on the back of the closed mouth, it will hinder the swing of its wings, and it will not even be able to take off normally.

Eventually, Lukka came up with a compromise by casting a peeping eye and handing Shut Up a glowing block of glass to clutch onto and fly to help illuminate it.

The parrot flapped its wings and, along with the Magic Eyeball, flew around under the dome and landed back on Luka's shoulder.

"What do you see?" asked Phil eagerly.

"I didn't see anything. Lukka spread his hands.

"Is it all damaged?" asked Ollie, looking at the broken stone walls around her.

Lukka shook his head and replied, "No, the situation on it is different from these murals, it is not a piece of it that has been dug up, most of it is covered by a layer of rock, and only a small part is exposed. ”

"Rocks?" was a statement that left Ollie scratching her head.

"Yes, rock!" he said, shutting up, flying upwards again, tossing around the dome for a while, and then picking out a small piece of stone with his claws and throwing it down.

Ollie ran over and picked it up, and as soon as she got it in her hand, she shouted, "This stone is so light!"

Lukka took it and rubbed it in his hand, and it was true that the stone could probably float up if thrown into the water.

"It's porous volcanic rock!" Phil's knowledge now comes in handy, "the magma has a lot of bubbles in it when it solidifies, so it's a lot lighter than it looks." ”

"Could it be that this hall was filled with lava?" asked Nora.

"Not really, there's no trace of lava anywhere else," Lukka dismissed the speculation, "I think someone deliberately painted the lava to cover the pattern." This vandal is probably the same person who destroyed the mural. ”

"Magma, don't be kidding, who has the ability to do this, can't even the rock giant down there?"

"Just because you can't do it doesn't mean that no one can. Luca said.

"And who can? You give an example?" Phil was clearly unconvinced.

"For example......" Lukka thought for a moment, "the spirit of the mountain?"

"Why would he do that? I'm not going to destroy my portrait anyway. Phil still doesn't quite agree.

"It's not much use for us to guess, and I speculate that the answer is probably behind this layer of volcanic rock. Lukka said, gesturing upwards.

"Then we're going to find a way to peel this layer of rock off? Ollie looked up with her greatsword, her sword was certainly effective against such loose rock, but the height of more than twenty meters made her useless.

"Take your time. Lukka cast the Mage's Hand five times in a row and began to work on the stone layers in the dome. Although the power of this low-level spell is limited, the rocks that can be picked down with claws with your mouth shut up are not too strong to think about.

However, he could not see the situation on the dome clearly, so he could only grope in the dark, which was too inefficient, and after half an hour, only a small piece with a diameter of less than half a meter was cleared.

"Captain, if we continue like this, our time for thermal protection is coming up. Crete reminded that although the temperature of the temple had dropped now, they were on a living fire after all, and who knew when the magma would erupt again?

"Idiot! don't buckle the rope like that, use the Wind Blade!" shut up and waited.

Lukka frowned, he didn't use spells that were too destructive, mainly because he didn't want to cause any damage to something behind the stone layer. But now, time did not allow him to clean up slowly, as archaeologists do, so he had to change his plans.

Halfway through the spell of the Wind Blade Technique, he suddenly stopped, turned back and said, "You guys find some cover, even if the stone on it is lighter than a normal stone, it will kill you if you hit your head." ”

"Oh, okay. Everyone responded and began to look for cover.