The ability to move large amounts of items fast no carts or portals “wont work over water”.
The One and Only Step
All you need to do is find a sea turtle and collect enough Chitin (pronounced ky tin) and make it into an abyssal Harpoon. After this eat some good food to gain stamina and make the bar as big as you can. And use the power you get from the first boss.
After this harpoon the person near you holding all the items (pvp may need to be on).
And start to run home. All you need to do is make sure to re harpoon the person if the line breaks. you can just drag them alone no issues makes it real easy to move lots and lots of metal or stone or wood.