Using a balloon to launch a rocket is already a thing. Especially interesting here will be the democratization & commercialization of launching micro a/o nano satellites from a relatively cheaper platform. Article Using a dirigible HAPS may also be a way to go, as you can control the platform's...

Such a balloon rocket launch pad would probably be a very worthwhile and cost-effective endeavor somewhere like Venus, with a far thicker and denser atmosphere and with extremely difficult surface conditions. On Earth, not so much.

As you may have seen, over the past couple of weeks, Worldbuilding has been building not a world, but a blog. The setup of that blog is now complete! You can come and visit us now. We've got a reasonable bit of content up there, and our organisation is good and looking set for more. Go and read...

In my story, there is a sword similar to J. K. Rowling's Sword of Godric Griffindor. When you are in danger, it will appear next to you, and then you can summon it later on. It will also replicate and save the powers of those who summon it (e.g, fire user summons it, now can light itself on fire....