You can summon pets in Undecember to automatically pick up loot for you. You do this by simply equipping a pet in your Pet menu.
Buying and selling items are a pretty basic game mechanic in Undecember that you can perform via the Peddler NPC.
Return Scroll is an item that allows you to create a portal back to town. You can get it by buying the item from the Peddler.
The Bronze Keep Essence is a resource in Coral Island that you can craft by using an Extractor device.
