Proving you have Magic!

[Altair_the_Vexed]

Subtlety is key. Thus, my sudden mile high tower that somehow is approved by the zoning commission and the FAA without anybody remembering signing the approvals will be understated, with only a tasteful classing in gold over a core of adamantine, rather than being pure gold held up solely by the fact that it can fly. I mean, it will fly, but it could support itself if it had to.

Tastefully done!

Me, first thing I'd do is find out how to safely leave the world with my loved ones, in such a way that once I reveal myself to be magical, no-one can follow me. I'm thinking of something like Pratchett's Long Earth, or a pocket plane, or something like that.