Many treasures and legends at sea revolved around ships that had sunk to the seabed. Besides, Death's Treasure was connected to the sailing ship called the Styx Ruler in the first place, so if there really was treasure here, it made perfect sense for it to lie deep beneath the sea.
For that very reason, Edwina reached the same conclusion, but she did not immediately put it to the test.
It was already getting late. Even if they dove into the sea to salvage it, the lack of light would make the task difficult.
On top of that, the pirates aboard had been on edge all day, so the Iceberg Admiral decided to wait until tomorrow to explore underwater.
That evening, Sifa summoned the Spirit World Treasure Chest. Following his earlier plan, he had Christie temporarily return to the oil painting that was her true body and stored her inside the chest, lest they encounter Amon in the ancient ruins and simply hand him something to eat.
Sifa also took out Ghost Scream. Since they would be exploring ruins connected to Death, they might encounter undead creatures, in which case Ghost Scream would come in handy.
Sifa also kept the String-Pulling Marionette with him. This item could control other creatures, allowing him to explore without going in person. By sharing a marionette's senses, he could effectively "be there."
The next day.
As soon as dawn broke, the pirates aboard the Golden Dream got busy. Sifa came onto the deck and saw Water Bucket and Ironhide pumping air into a brown leather bag.
"What is this?" Sifa walked over and noticed that a breathing tube was attached to it. It looked rather like a crude oxygen bag.
"A water lung. Emperor Roselle invented it. It's a tool that lets you breathe