The Floating Islands

Seven wizards stood in a circle around a pedestal. On top of the pedestal were about fifty glass cubes. Inside of all of them were what looked to be islands, but not the type you would find in the ocean. Instead, they were sky islands. They all had different terrains, from grasslands to mountains to deserts. One of them had an ocean surrounded by what looked to be a stone wall. There were towns on some of them, and a castle on one. And they all had wooden docks, sticking out over the edge.
“Start!” yelled Zordlan, one of the wizards. He started to cast a spell, so complex that nobody ever cast something with power and complexity even remotely close again. Green light flew out from his hands and surrounded the six other wizards. Kali, a wood elf, cast a spell of mass floating on the islands in the cubes, which all started hovering. Daryn, a half-elf, cast a spell that destroyed the glass cubes surrounding the islands, and the other wizards streamed magic into the islands to keep them together. Zordlan’s spell completed, giving all the wizards near infinite energy. Daryn moved the islands into low orbit, only able to do it because of Zordlan’s spell. Everyone streamed all their magic into Daryn, who kept all the islands within the range of his spell as he cast growth spells on all of them. He then cast a spell that created air around the islands, linking it to Placeholder II’s atmosphere. The other wizards left Daryn to tying off the spells as they gave all the islands protective shielding from space, seeing as a meteor could strike one of the islands and bring it crashing down to Placeholder II’s surface, destroying more land in an instant than twenty powerful wizards, all working together, could accomplish in twenty years. The protective spells also made it so that the islands wouldn’t collide with each other.
The growth spells completed, making the smallest of the islands be bigger than a small town on its surface.
The wizards gave control of all the spells to Zordlan, who tied them off in a large purple crystal. It started floating a couple feet off the ground. All the wizards started casting protective spells around it, designed to make it last indefinitely, and be able to survive being inside a sun for several trillion years.
Zordlan cast spells of flying on all the wizards, and linked the crystal to himself, so when he flew up to one of the islands, the largest one, the crystal followed him. Zordlan positioned it in a dungeon in the center of the island. The other six wizards unsheathed their weapons and laid them on pedestals. Instantly, the weapons flew upright and started hovering a few inches in the air above their pedestals, powered by the massive crystal floating in the center of the room. Zordlan removed the linking spell on the crystal, so that he could move around without it following him. All the wizards left the dungeon. Zordlan set the traps to fire when someone walked into the dungeon. And all the wizards left, never to be seen by anyone again.

About three thousand years ago, seven wizards created the floating islands. They are in low orbit, with spells on them to make it so that they can’t bonk into each other.
According to ancient legends, the six swords are stored in a dungeon in the center of the largest island, but people have argued for centuries about which one is the largest. One has more mass, which was discovered by a very bored wizard about a thousand years after the floating islands were created. But another has more surface area, and nobody really knows which one is the one with the dungeon.

Geography

sky islands

Fauna & Flora

pretty much everything you could find on the surface

Natural Resources

pretty much everything you could find on the surface, except there's limited resources.