Prologue: Down the River

Night took over as a river swept downstream. It went calmly, not stopping. It shined now as the moon came out, followed by tiny, bright stars.
Strangely, in the water, were a bunch of injured animals - a snake, a squirrel, a hawk, some wolves, and more.
Two animals were walking in the night; a dark orange male wolf, and a dark brown male cat. They stopped when they saw the mysterious river.
"There's no river here!" the male wolf spat, and he rounded on the dark brown cat, "what do you think about this, Muddyfur?"
"I... I-I don't know what it is, Flamingclaws!" Muddyfur gasped, shaking as usual.
Flamingclaws sniffed at the squirrel in the river. He picked it up, and it screeched.
"Boneleg! What happened?" Flamingclaws demanded, growling.
"The Water Tribe defeated us!" Boneleg squeaked.
"What?" Flamingclaws snarled. He turned to Muddyfur. "Can you believe that?"
"N-No sir! I can't believe it!" Muddyfur trembled.
Flamingclaws looked at Boneleg. "Okay then. You're going to see our leader."
The black squirrel gasped, "No! Please! H-He'll kill me!"
"Shut up and face your fear! C'mon, Muddyfur, let's take Boneleg back to our camp!"
"R-Right then," Muddyfur whispered, and padded after Flamingclaws. Muddyfur had been forced to join the Firebenders; everything he did was normally against his will.
Flamingclaws didn't care about the other Firebenders. They'll regain consciousness and come back anytime now, he thought.
They both made it to the entrance. At the doors were guards - a lynx and a very small barn owl. The Firebenders took turns guarding.
"Ah, you found them," smirked the lynx.
"And you would've been with them if you hadn't fled from that sorry excuse of a pup, Nuewfoow," Flamingclaws snarled.
The smirk on Nuewfoow's face dropped. She quickly nodded, and let Flamingclaws, Muddyfur and Boneleg through. Boneleg was quivering in fear, but Flamingclaws didn't care.
They padded through their camp, which was an abandoned city; it glowed red because of some lit lanterns.It was mostly deserted, because many of the Firebenders had gone to attack the Water Tribe.
After a while of walking, they reached a building in the middle of the city. Outside were two guards - a white great horned owl, and a female raccoon.
"We're here to see him," Flamingclaws growled.
The raccoon nodded, and stepped aside. Flamingclaws went into the building. Boneleg came in reluctantly, and Muddyfur stayed planted to the spot he was standing.
Flamingclaws rounded on Muddyfur. "Well? Come in."
Muddyfur didn't say anything; he held a look of horror on his face.
"C'mon, Muddyfur... You're not going to abandon us now? When we need you most? If you do, I'll fight you, and there's a small chance you'd come out alive then..." Flamingclaws snarled.
"N-No sir! I w-wasn't going to abandon you! I... Was just wondering... Should I come with you into his place?" Muddyfur said.
"Yes!" Flamingclaws snapped, "Now come, or you'll have your fur on fire in less than a second!"
Muddyfur quickly ran to Flamingclaws's side. The three Firebenders entered the building. It was barely lit up by any lanterns; you wouldn't be able to see anything in front of you.
"Yes?" said a cold, high-pitched voice. Muddyfur squeaked in fear.
Flamingclaws bowed, despite it was pitch-black dark. Muddyfur quickly copied Flamingclaws. Boneleg stayed glued to the spot.
"We have news, Ironfang," said  Flamingclaws calmly, and he prodded Boneleg with his claw. "Isn't that, right,  Boneleg?"
"Y-Yes!" Boneleg gasped, scared out of his wits. He stepped forward reluctantly.
"Go on," said the cold voice.
"W-We lost against the Water Tribe!" Boneleg said.
"What?" growled the voice. "We are Firebenders! We are not to lose against those weak Waterbenders! How in the name of the Darkbenders did they win?"
Boneleg didn't say anything. Flamingclaws listened with interest.
After a while, Boneleg hadn't said anything.
"I command you to... TELL ME!" the voice roared. Boneleg let out a whimper; he obviously didn't want Ironfang to know that his worst enemies helped the Water Tribe.
"Boneleg, you're making Ironfang angrier then he would be," Muddyfur whispered to the squirrel.
Boneleg still wouldn't talk. Flamingclaws could tell he wouldn't say anything more.
"I see you won't say any more..." said the cold voice calmly. There was a flash of red, and it glowed in the dark. Boneleg screamed. Flamingclaws knew that Boneleg's fur was on fire.
Then, a dark shadow zoomed in front of the fire. Flamingclaws felt a cold pelt brush his. There was a scream, which was cut short. The dark shadow moved away, and the flames still burned.
Boneleg was dead.
"Muddyfur," said the cold voice. Flamingclaws could imagine Muddyfur flinching. "What do you know about the battle?"
"I'm t-terribly s-sorry! But I know n-nothing about it!" Muddyfur shrieked.
The voice didn't reply for what seemed like moons. But, finally, it spoke again. "Flamingclaws. What do you know?"
"All I know is, I saw our Firebenders laying in a river," Flamingclaws shrugged.
"They obviously got pushed into a river," Ironfang growled. "Who did this?"
"Fang told me that The Bending Tower were helping the Water Tribe," Flamingclaws growled.
"So The Bending Tower helped to defeat us! We'll get our revenge on the Firebenders... Flamingclaws and Muddyfur, you are dismissed. Take that sorry excuse of a squirrel with you, and tell everyone to gather for a meeting! We're going to plan our revenge..." the voice laughed evilly.

Author's Note:
Meep. Ironfang. And you just read him killing Boneleg. Poor little squirrel. Good prologue, no? ;) I can't wait to write Chapter 1... LOL.