This magic mirror crap.

[jhend27513]

So I was standing in my home, using the magic mirror and I used it and I was teleported and I instantly died. What the heck!? I can't even use it again now to get back!!

[TokiWartooth]

magic mirror teleports you to the last place you were outside/sky visable/ had the mirror out. You probably teleported into a structure. also its a one way port, the idea is to get you out of a dungeon.

[DeadRedSkittle]

Its a concept taken from Terraria.

[TokiWartooth]

its a concept from dozens of places.