The House of Hades - Argo II Big

He didn’t need to finish. They had to hope Percy and Annabeth could survive long enough to find the Tartarus side of the Doors of Death. Then, assuming the Argo II could reach the House of Hades, they might be able to open the Doors on the mortal side, save their friends, and seal the entrance, stopping Gaea’s forces from being reincarnated in the mortal world over and over.

Yes…nothing could go wrong with that plan.

Nico scowled at the Italian countryside below them. “Maybe we should wake the others. This decision affects us all.”

“No,” Hazel said. “We can find a solution.”

[...]

“We need some creative thinking,” she said. “Another way to cross those mountains, or a way to hide ourselves from the numina.”

Nico sighed. “If I was on my own, I could shadow-travel. But that won’t work for an entire ship. And honestly, I’m not sure I have the strength to even transport myself anymore.”

“I could maybe rig some kind of camouflage,” Leo said, “like a smoke screen to hide us in the clouds.” He didn’t sound very enthusiastic.


- The House of Hades, Chapter 1