Oh, shit... tha'fuck am I thinking?!
Don't do this! I mean, not on the planet don't do this!
You know like with batteries you can sometimes get thermal runaway and it'll create an EXPLOSION!? Well the same can happen when creating multi-dimensional or cross dimensional matter, you can accidently mess up and create density runaway, which in turn will either go supernova or it'll collapse into an artificial black hole!
Same when you're creating temporal energy, it can sometimes create temporal runaway, creating a ~literal~ time bomb!
And, likewise in turn, that's how you can create a reality bomb, using reality runaway... it would be like turning a section of our physical reality into a kind of living wonderland... living space... sentient space... what happens when physical reality become sentient?
Have you ever read that book, uh... The Thief Of Always... sorta like that I would imagine.
Oh hey... what if like... you had a monowheel... but it was shaped like a CHOCOBO! :D
I included some very horrible concept art... but you can get the general idea anyway.