Son of Tartarus

We're never gonna make it

  The ground in which we were standing started moving. I was petrified, well, not literally like with Medusa, but I was scared. The others didn't look too good either.
-"We'll make it" Jay said
  We cheered for me.
We were happy, until the monster came.
  This monster resembled the chimera but it was clearly different. This one was a lion with a scorpion's tail and a man's face.
"A manticore!" Shaggy yelled
  It chuckled.
-"Yes, my dear. I am a Manticore. Kneel before me or die. Your choice"
-"You'd be surprised how many times we heard that in the last few days" I said.
-"Fair enough, you choose your own fate" It said
  It charged.
  The manticore was surprisingly fast. It could avoid are attacks and damage us faster that I would've thought. Of course, Harry was way faster. The battle was clearly just both of them battling and the rest of us taking an occasional hit and being damaged. It got to a point where it was unbearably annoying. That's when my instincts decided to kick in.
  First, I let go of Shade and it turned into its shadowy form. Then, the floor beneath the manticore started to twist and turn. It could barely move. The manticore was trapped, and only then did we kill it.
"That was awesome" Jay said
-"Absolutely incredible!" Tina commented
  I would've said something, but we heard monsters nearby.
"Maybe we should go" I suggested
  Before we were able to, a creature jumped at us. It was... a lion.
-"A lion? In Tartarus?" I asked
The lion roared in anger.
-"No. Not a normal lion. That's the Nemean Lion, which was killed by Heracles" Shaggy informed
-"Same thing. Let's kill it!" Jay said.
-"Jay wait!" Shaggy began
  Then, the Nemean Lion jumped at Shaggy, and chewed his pipes, while with his head, throwing him aside.
-"Shaggy!" I cried
  The lion roared once again, but this time, his roar was amplified a 900%. It was so loud my ears wanted to pop out. I fell on my knees, which was a terrible idea since:
a) we were fighting,
and b) we were in Tartarus, which has a floor of what is mostly broken glass and other pointy stuff.
He jumped at me, with his mouth wide open so that I could see all his teeth. You'd think his teeth would be all sharp and scary, yet they weren't. They were all shattered and ugly, as if he had been killed by eating something stupid like a sword, a stapler or a spear, multiple times.
He bit my neck, which hurt like nothing else could ever equal and nothing could approach. It started bleeding so much I thought that Tartarus would get a new river. Suddenly all the blood turned black, and my skin became a lot harder, like steel, and then even harder, like titanium. My vision became clearer. The poisonous air around me stopped bothering me. My thoughts became clearer. My wound healed itself. Shade's blade, which had always seemed to be made of hardened shadow became harder, like a real sword, and blacker like some sort of metal of death. I knew what to do.
I knew that this beast had been killed by it eating, or being forced to eat weapons, so that's how we had to kill it.
I looked at Jay, who was struggling with the lion's tail. Tina was fighting two of his paws, and Harry the other two. I called out for Jay, who barely glanced in my direction for a split of a second. I ran for him, but the lion followed me, throwing Tina, Harry and Jay as if nothing.
"Jay! Feed him Sitari!" I called
-"What? You mean wheat?" Jay asked
-"No! Sitari, your spear!" I yelled
-"ROAAAARRR"
-"Okay..." Jay said quite uneasily
Jay stabbed the lion in the back and it quickly turned in his direction. The lion roared with all his strength, and he one in his lungs of the pipes. Jay threw his spear at him.
Sitari went all the way inside the lion and came from the back. The lion was dead.
Just when the lion fell, so did I. My titanium-like skin was gone, and all the perks it had brought went with it. I collapsed, and I'm pretty sure I saw someone else falling, though I didn't see who before it all went black.

......

I woke up to see that Harry, Tina, Jay and Shaggy were carrying me through the floors of Tartarus.
"Morning, sleepyhead" Harry greeted.
-"How... how long was I away?" I asked
-"Couple hours" Tina answered
I stood up. I looked around. Suddenly, a glimpse of joy came to me, right before total disappointment.
In the near distance, there was a river. A lady at its side, and with her, probably the worst monster in all of Greek mythology, The Hydra.