Naugus strokes his beard with his one hand as he considers his answers. "Limits? Size can be a little risky; make it too large and you run the possibility of it expanding on its own due to lower stability. But anything can be fastened to a single shape with the right finesse." Which is not how Naugus plays when it comes to magic, but he can do it. He just has to be asked to or care enough.

"If this horrible barn of metal and glass comes down, the portal will remain. It stands on its own, after all. Which is what you meant, right? If you're so worried about that, why not find someplace that doesn't look like it's about to rot apart any second now?!"