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

Chapter 5: Thor

Wakanda was as silent as a tomb.

Thor, Black Widow, Captain America, Bruce Banner, James Rhodes were all standing in a circle silently grieving for their lost friends. Only when Captain America spoke did the truth actually sink in.

"They're gone." he breathed. "All of them."

Thor stood with them in silence. He watched the ashes of their fallen friends drift away in the wind. Suddenly, he felt himself leave his body. A vision? Now? Seriously?

He saw Hotel Valhalla before him. There was a crowd in the hallway. Scarlet witch, the tree, even those others he had met in space....The Wizard from New York, too? And... a boy in a ridiculous red costume with a spider insignia?

They were all there. The heroes, gathered in the halls of the dead. Just as he expected them to be. He felt a deep pang of sorrow as he saw that his brother -- who had died a hero -- wasn't there among them. Of course Loki wasn't there — once gods died they were gone, and could never come back. But the others could. He breathed a sigh of relief when he saw that Tony wasn't among them.

There was also another blond haired boy, holding a bronze sword with intricate carvings on the hilt. Thor felt an aura around this one, a crackling, immensely powerful one not so different from his own. This boy was not of Asgard, but....

Then he saw the tattoo on his arm. SPQR? The Roman legion. What was this boy doing here in Valhalla? Wasn't he supposed to be in the Underworld with Haileys or whatever he was called?

He snapped out of his trance and found the remaining Avengers staring at him.

"Thor?" Cap started but Thor cut him off.

"I must go." Thor held Stormbreaker, ready to summon the bifrost.

"Where?" asked Natasha.

Just as he vanished into the Bifrost, he uttered an answer that made no sense to the Avengers.

"To bring our friends back."