Skyware Chest

Island loot is not a lottery the way most chests are. The first island a world generates gets the first item on the list, the second gets the second, and so on through the first four. Anything after that rolls freely. So if you want one specific headline item you are not farming for it, you are just visiting enough islands.

A small world only makes three islands, which means one of the four never appears. The Celestial Magnet is the one that falls off the end. Medium and large worlds are guaranteed at least one of each. If you are choosing a world size and you care about that accessory, this is a genuine reason to go bigger.

The headline item gets the attention and the extras are where the useful things hide. The Sky Mill unlocks a crafting branch you cannot reach any other way, and Fledgling Wings hand you flight far earlier than you have any business having it. Both are chance extras rather than guaranteed, so clear every island instead of stopping once you have the headline you wanted.

Some world seeds swap these out entirely. The harshest case locks island loot behind golden keys, which puts everything up there out of reach until the dungeon is open and turns an early game power spike into a mid game one.