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The floor crunched beneath Jack's boots as he came to the entrance of Crystal Eye cave. He couldn't see past his nose when looking into the cave, it was pitch black. The pirate stepped backwards and gazed at the castle above. The sky was a beautiful red as the sun was setting slowly, making the shape of the dark castle bold and clear for all to see. Wondering how the hell the navy had got to this castle – since they were useless – Jack turned round to see the others climbing up the hill towards him. He smiled as Merlin was at the front.

Lazy inlanders', Jack thought. Merlin was first to reach him. Huffing, the good lad gave him a smile. Later the knights arrived.

"Right, so what's this place again?" Arthur asked, not the slightest out of breath. Jack rolled his eyes.

"Crystal Eye cave," Jack said slowly. "If we can find the door on the other side of this cave, we'll be able to climb up a ladder into the castle… Hopefully the dungeon, where we think Morgana is being kept," he added a grin on the end. Arthur nodded.

"Right, let's go," Arthur said, walking towards the cave.

"Oh, and Merlin, get rid of the dog," Jack called behind him. Merlin frowned. A bark made him turn round. There, wagging its tail was a brown Labrador. Merlin raised an eyebrow, the dog look familiar, but Merlin didn't know where from. He shrugged and knelt down in front of the dog.

"Sorry boy… Or girl, but you've got to stay out here and not follow, okay?" The dog barked and Merlin got up and walked over to the cave, following the others.

Merlin walked into the cave and stopped. He couldn't see anything, the cave was darker than the darkest night, there was nothing but... Black! Merlin could hear knights and pirates banging into one another, knocking into the walls and tripping up over their own feet. The young warlock froze as he felt something run around his legs, stopping and rubbing itself against him. Kneeling down with his hand outstretched, Merlin touched the animal...

It was the bloody dog.

Sighing frustratingly, Merlin stood up and slowly started to walk forward. After a few steps, Merlin hit the wall. He jumped back in surprise, but calmed down as he realised what it was. The dog weaved around him as he walked forward, feeling his hands along the wall for support.

Suddenly, Merlin sprung his hand to his chest and clutched it in pain. Merlin looked pointlessly at his hand, even though he couldn't see it in the silent darkness.

"Merlin!" came a voice in the darkness. It was Jack.

"Jack!" Merlin called back. More voices suddenly came alive, everyone was talking at once.

After a while of pointless, chatter in the dark, someone lit a torch. That one torch lit up the whole cave, and when Merlin adjusted to the light and saw the cave, his mouth formed an 'O' shape, and he knew why it was called Crystal Eye cave. Everything was made of crystals, the walls, the ceiling, the floor... Everything. The light from the fire bounced around the whole cave, dancing off one crystal to the next. Merlin looked at a sharp edge on the wall and saw blood. Looking at his bleeding hand, he realised it was his.

Merlin looked around to see four ways through the cave they could go. Before he could even think of which way to go, the dog ran off down the third way. Uncontrollably, Merlin's feet followed the dog. He ran for a little bit before the dog stopped and started to sniff the floor. Merlin stopped to catch his breath. He looked up and gasped at the walls, everywhere he saw himself. Each crystal was like a mirror.

Merlin looked around and saw no one else in the crystals. The dog ran off again, and obediently Merlin followed. After a short run with the dog, they came to a ladder. The wall behind it was normal rock. Looking up, he saw a door at the top. Looking around, Merlin knew that no one else was going to be coming soon.

Picking the dog up, Merlin climbed the ladder one handed, opened the door and climbed through into the castle.

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