The fight for the Erebor (Edited)

Trolls

"Hey, there's a light", I notice when we explore the area. "Here. Stay down."

We hear laughters.

"What's there?", Bilbo asks.

"Trolls", Fili answers.

One of the three trolls carries the ponys to his friends and Bilbo realizes, we have to save them.
We begin walking, Bilbo however hesitantly.

"If there's trouble, shuhu twice as a barn owl and once as a snowy owl", Fili says.

One of the tree trolls complains about the food.
We sneak to them. Bilbo's running to the ponys and looks at the rope.
I distract the trolls by standing in front of them. I become invisible to them by pulling my coat toight around me.
I ram my swords into their huge feet and become help from the dwarfs. Soon two trolls have Bilbo into their hands. Kili's going to run to them, but Thorin stops him. I pull my coat again tight around me and become invisible. I climb onto a massive stone and put an arrow in my bow.
Mithrandir's standing beside me and he cracks the stone. The sunlight appears and the trolls become stone. The dwarfs, who hang on a spit over the fire for the most, are happy about their rescue.
I jump from the stone and land softly on my feet. I run to Thorin, who's laying on the ground. I release them from their sacks and they get the others from the fire.
We walk inside the cave, where Thorin and Mithrandir find swords. Mithrandir gives one to me, while Dwalin and the others bury a chest of gold.
I look at the sword with a watchful eye.

"These swords didn't forge a troll", Thorin says.

"And not a blacksmith of the man", Mithrandir adds to Thorin's comment.

"They've been made in Gondolin from the high elves of the first age", I explain and Thorin wants to put it away. "Thorin, you can't wish for a better blade."

He's watching the sword carefully.
The other dwarves are leaving the hole and I hear, that someone behind me stepped on a sword. I look at Mithrandir's feet and he follows my gaze.

"GIve it to the hobbit."

I leave the hole, and Mithrandir gives Bilbo the "sword" and I hear something crashing through branches. For safety's sake I pull my sword out, but put it away, when I recognize Radagast. He's still a few meter away.