Immortal, the Greatest Destiny

I own this fanfiction, that's all. Merlin BBC belongs to BBC.

Chapter 1: The Beginning from the End part I

After Kilgharah left, Merlin, carrying an unconscious Arthur on his arms, slowly stepped down into the lake, the Lake of Avalon, the gateway to the source of all magic. His eyes flash gold. On the surface of the water which was still so peaceful just seconds ago, thousands of bubbles appeared. Merlin and Arthur's bodies shine with a golden light. Merlin closed his eyes, and when he opened them again, he saw them being in a place that looked like some kind of ancient construction. In front of him were huge shelves of plenty of crystals and rocks. Merlin had to admit that he wasn't quite sure what to do when arriving at the lake, and he just followed what his magical instinct told him to. Thankfully, it worked. They got to Avalon.

"So you have arrived, Emrys!"

Merlin startled. He looked back. Behind him, stood a tall man wearing a black cloak. His hood covered half of his face, so Merlin couldn't really tell how the man looked like. But certainly, he could tell this man had powerful magic, he could feel it.

"Who are you?" asked Merlin.

"You don't need to know who I am. Just know that I was sent here by the command of the Old Religion to assist you Emrys." – said the hooded man. Merlin shivered. This man's voice sounded quite young, but the deepness made it sound as though it carried all the sadness and painfulness on the earth. Right! It was like The Cailleach's.

"Y-you'll help me save Arthur?"-asked Merlin, finally back to his mission-"please, he's dying…" His voice cracked and became smaller as tear started to roll down his cheekbones.

"Certainly. However, it will still be you Emrys who will save the Once and Future King, as it has always been."

"But, how can I save him?"- Merlin asked nervously.

"The answer is in your head Emrys. And the material you need are right up there."

Merlin turned back and faced the shelves again.

"Those are no normal crystals or rocks. They were already on the earth the day the earth was born. They were among the earth's starting materials. Each of them holds great power. Still, they need another great power to bind with their own, thus transfer them into the forms their power could be used the most." – the hooded man continued.

After carefully laying a weakly-breathing Arthur on the floor, Merlin, though still confused with the man's words, decided he had to do something, right now. He scanned the crystals and rocks with his magical vision. Suddenly, a little black rock on the top shelf shined bright as he scanned through it.

"That's it." Merlin shouted. He then used his magic to move the rock to his hand. "It's so warm."

"That's because this rock holds the heat that can warm souls and convince them rest back at their bodies"-the man explained-"now bind your magic to it, give it a new shape and name. It responded to you so it should already recognize you as its owner."

Merlin stared at the rock. "A new shape and name…" he mumbled.

"Calidicus!"-he whispered as his eye flash gold. At that moment, he felt a small bit of his magic transferred to the rock and bound with its. The rock instantly transformed into a dagger.

"Very well!"-said the man. "Now use it and save your king. All you need to do is to let it touch his heart, its magic will take care of the rest."

"You mean, I'll need to…stab Arthur in his heart with this dagger?"-Merlin asked with a shaking voice. His face turned pale and he felt like some invisible dagger already stabbed his own heart as the thought came through his mind.

"Calidicus, in others' hands, would be nothing but a mortal blade, but in the hand of its wielder, it'd be able to heal any wound and disease. That being said, you must make sure it can recognize you, your magic, to be exact, or else it'd see as any normal human being and you'll kill your king instead."

Merlin felt his heart stopped the moment the man finished his sentence. Sweat was all over his face. He panted heavily. Just one mistake and he'll kill Arthur himself. But if he just stayed here doing nothing, Arthur would die from his wound for sure, and he didn't look like he had much time left either. Still, stabbing Arthur, probably killing him with his own hands, how could Merlin do that?

"Believe Merlin! Believe what your heart knows to be true, that you have always been and always will be." – Merlin stunned as the heartwarming words of his father in the crystal cave came back to his mind as a reminder. Suddenly he found himself strangely calm. No more sweat, no more heavy breaths, no more doubts. Now he knew exactly what he should do, it's just as obvious as who he knew he was.

"Magic,"-he said, with a deep calm voice-"that's what I am."

His eyes flashed gold, and Calidicus's blade was already deep in Arthur's chest, touching his heart which was about to give up beating. A moment of silence, then the dagger suddenly got warmer and warmer while diffusing beautiful bright light spots from it. Tears streaming down Merlin's face when he saw Arthur's wound from the battle earlier healing itself. Merlin burst out a small laugh of relief. When the wound healed completely, Merlin quickly pulled out the dagger. Not even a single scratch was left on Arthur's chest, except for that his armor now had another hole on it.

End chapter 1