A/N: Thank you to people who've reviewed, favourited and followed so far! A special thanks to CarlaKitten21, SnowWolfe6631, LovelyMunchie and andifdreams for giving me such lovely reviews.

I have to apologise (again) for what is to follow. I swear I can write happy stories it's just the sad ones are so much easier to write.

Dark

Annabeth could feel her hands slipping. The blast from the Argo II hadn't done the shaky for any good, and while the others had been securing the Athena Parthenos it had collapsed completely. The thread had dragged her backwards through the hole before she could register what was happening. Percy had lunged for her but he wasn't fast enough; she had caught the look of fear in his eyes as she slipped past his reach into the abyss. By some miracle she had caught hold of a piece of jutting out rock, but Arachne's pull was too strong.

Percy was yelling for help but his words were lost in the general noise. Now he was staring down at her, his green eyes wide with panic. Her right hand slipped and put the strain on her left hand hard. She gritted her teeth, feeling like her hand was going to come out of its socket. As it sensing her pain, Percy renewed his shouting.

Now only three fingers held on. She couldn't hang on much longer. Annabeth smiled up at Percy, but she had a feeling it looked more like a grimace.

"Come on, Annabeth! Hold on, we're almost done!"

He sounded so hopeful, but she knew it was in vain.

"I love you, Seaweed Brain!" She called up. If Arachne was going to pull her down, it would be on her own terms. Annabeth took one last look at Percy and let go.

The fall was longer than she expected. She felt a momentary stab of panic when the Cocytus loomed below, but it soon dissipated. Who cares if the impact killed her? She'd die anyway.

She hit the water, and instantly the voices surrounded her. They were right. Maybe she should just let go and drift into oblivion. Her head slipped below water. Her lungs screamed for air but she ignored them. She started slipping away.

She had almost gone when something reached in and dragged her out. Annabeth looked up into the monstrous face of Arachne.

"Poor, child of Athena. No one to save you now, and no weapon to defend yourself with. At last, time to claim my sweet revenge."

The monster stabbed down and the world turned black.

Something changed inside Percy that day. Something snapped. When Nico had walked into the room shaking his head, Percy had walked out. From that day forth, the son of Poseidon smiled no more.

The light in his green eyes that used to sparkle had dulled and even the colour had darkened, like the sea on a stormy day. His usually happy, funny personality had turned dark and serious. His friends tried time and again to talk to him, hoping that just this once he might respond with a smart answer or a witty comment. Instead, they were met with silence.

When they were talking about the next steps, they were shocked at how ruthless he'd become. In battle he was like a wild animal, refusing to be tamed. He killed anything that dared get in his way. He often turned on his allies, yelling at them to do something, unless they wanted to get killed. His anger grew, and with that so did his powers. Powerful tornadoes swept monsters away and huge floods drowned many more. It was when he choked an empousa to death on her own bodily fluids that they really began to fear what he'd become.

They prayed to the gods to do something, to help Percy see the light again, but to no avail. Not even Poseidon came to the aid of his only half-blood child.

The heart of Perseus Jackson had turned black, and nothing could be done to reverse it.

A/N: Yay! Dark!Percy! The next one is Solangelo, so I promise it'll be happier.