Assembled: Earth's Last Heroes (A Riordanverse and MCU crossover)

Chapter 1: Jason

Jason Grace woke.

He was lying on the hard, smooth ground. The battle with Caligula seemed only moments ago and he could still feel electricity humming in his veins. There wasn't a single scratch on him. Not a single arrow was stuck on him and he could no longer see the wounds that had sent him to this place.

What was this place?

Slowly he got to his feet. Somehow, despite everything, he still felt better and stronger than he ever had before. He felt like he could run up the Himalayas. Which was weird, considering he had just been stabbed between the shoulderblades.

He was in Malibu. More specifically, the McLean mansion area, just as he had told his loyal Tempest to get them to, except... where were Piper, Apollo and Meg?

In front of him was a massive, beautiful townhouse, one that he did not recognise from his previous visits. This was definitely not the McLean mansion -- it was twice as big. He approached the double front doors. In front of the house were two signs. One was in weird squiggly lines. Runes. The other was in English:

HOTEL VALHALLA

Valhalla....Jason remembered the Norse mythology he had learned. Lupa had made sure they were well versed in other mythology as well. Jason had thought it was all just fantasy, but since Percy had told them the Egyptian gods were real, he wasn't sure what to believe anymore. He and Annabeth had also told them...

Annabeth had a cousin who was a Norse demigod. Who was dead.

He rubbed his eyes. From his studies, he recalled Valhalla was the Elysium equivalent in the Nine Realms. And that means.....

He was dead.

So that's why I couldn't see Piper, Meg and Apollo! I wonder if they're okay.

But... wait...why here? Why not Elysium? I'm a Roman demigod, not a Norse one, like Annabeth's cousin.

He needed to find answers. Immediately.

Suddenly, the double doors opened, as if hearing his unspoken plea.

A burly man appeared. He was dressed as a security guard: black cap, black gloves, and a black jacket. But there was no way this guy was an actual security guard. Who would hire someone with such bloodshot and murderous eyes? And... was that a double-bladed ax?! His name tag read: HUNDING, SAXONY, VALUED TEAM MEMBER SINCE 749 C.E. That was also probably the year he last shaved.

"Sorry," Jason stammered. "Is...is this Valhalla? The hall for dead demigods?"

The man scowled. He shuffled closer to Jason. He smelled like turpentine and burning meat.

"Demigods? The term here is einherji, boy. And you don't look like much of an einherji to me."

"No, I'm a demigod. My name is Jason Grace. I'm a son of Jupiter. Or Zeus, I suppose."

The security guard recoiled from him like he was poison. "There's no way, boy. Greeks and Romans have their own underworld. You must be mistaken."

"I'm not," said Jason. He pulled up his shirt sleeve to reveal his SPQR tattoo. "I'm here now, for whatever reason. I'm dead, I'm Greek-Roman, and I need to find out why I'm here. Help me. Please."

The security guard, Hunding, stayed silent for a while, pondering this dilemma. "Then you must have a purpose to be here. Come, I'll show you to registration."

Registration?

"Is this some kind of hotel?" Jason asked.

Hunding grinned and led him through the double doors.

"Welcome to Hotel Valhalla, kid."