(Hello my dear Wan.)

(Grampa! Are you going to finish my story?)

(Uumm... Well, it's been a while, and my old memory isn't what it used to be. Mind reminding an old man where we were up to?)

(Silly Grampa! Remember we were up to the bit where Raava made people, and animals and then Vaatu was going to attack and..)

(Oh yes! That bit.)

(Grampa I asked Dad where babies come from, but he wouldn't answer, he just kept talking about other things. He got all red in the face and Mum laughed at him.)

(*chuckles* No doubt. Now hop in bed, or Mum will interrupt before I can finish the story)

Now when I finished last time, Raava had just finished creating people, as well as the cycle of reincarnation. But Vaatu was gathering strength in the shadows, and time was running out.

Now Raava watched over humanity as it made its first steps in sentience. She saw the first wheel. The first houses, built the a lion turtle's back. The first societies were founded around them. Raava created the seasons so man could grow their crops. But these seasons were constantly falling out of time, so Raava charged a spirit with its upkeep. This spirit was Tiva, and she became quite important as you'll see.

With this done, Raava felt that she could sit back and let humanity look after itself.

How wrong she was.

Vaatu was rallying support in the Spirit World, both causing chaos and feeding off it. And time was running out. Normally a spirit can't just go between the worlds on its own.

They need days which are very spiritual, where the worlds are closer. Like the winter solstice, for example.

However a day came when every planet lined up perfectly as they went around the sun. This was called Harmonic Convergence, and it only happens every 10,000 years. And harmonic convergence is like a boost for spirits, especially the great ones.

Vaatu used the energy to break through the barrier between the worlds, creating a permanent hole between the worlds. He entered the material world. His influence spread across the whole world, corrupting everything. His darkness pinned Raava at the South Pole, at the opposite end of the world from the hole Vaatu made. Vaatu planned to rule both worlds, throwing everything into chaos and darkness.

He sent spirits from the spirit world to destroy or corrupt humanity.

But harmonic convergence hadn't finished, and Raava could use that power to make her own hole, enter the Spirit World and face Vaatu.

(And then boom, pow! Raava kicked Vaatu butt!)

(Heh heh, calm down a bit Wan. It didn't happen quite that way)

(But Vaatu got his butt kicked, right?)

(*sigh* Yes, Vaatu got his butt kicked)

(Yeah!)

(Now lie back down or you'll call your mother's wrath down on both of us)

It was a tough fight, and essentially a big tug of war between Raava's order, and Vaatu's chaos. Vaatu sent dark spirits to attack Raava, but she just converted them back to light. She tackled Vaatu, trying to subjugate him. Vaatu broke free, used his chaotic aura to weaken Raava, before attacking, whipping her with his whiplike appendages. She went down under the barrage, wounded in a dozen places.

Vaatu thought he had won, and gloated, not realizing Raava was holding back. She waited until harmonic convergence was almost finished, and sprang, wrestling Vaatu into submission. Vaatu tried to fight back, but at that moment, harmonic convergence ended.

Raava had won, but she was now stuck keeping hold of Vaatu for the next 10,000 years. Meanwhile, the remaining dark spirits flooded the earth. Humans had to stick to the safety of the giant lion-turtles. Each colony became isolated, they forgot each other, and spirit wilds spread over the whole world.

(And now, sleep)

(Grampa, is the story over?)

(No Wan, just this part)

(Can you tell the next part?)

(Not tonight, or your mother will tell me off for keeping you up too late)

(Alright Grampa)

(Goodnight my dear Wan)

(Goodnight, Grampa)

Sorry this ended up so short, but I could only do this much for the battle, as well as the set up for the next chapter, which will be covering the things we learned during the episodes "Beginnings" of LOK.

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TLATL