This article is about the location. You might have been looking for the episode of the same name.
The Forge of Creation is the source of the universe's greatest power and where ideas become real. It is outside the universe. It is a place hidden to everyone except Celestialsapiens, Professor Paradox and anyone with the Map of Infinity.
Celestialsapiens are born in the Forge of Creation, but some live in the Milky Way Galaxy.[DM 1]
With the Forge of Creation enclosed by a Chrono Randomization Barrier, it is out of sync with all time and without the Map of Infinity, totally inaccessible, except for Professor Paradox and Celestialsapiens. However, Paradox is not allowed to be within 500 light years of a Celestialsapien and thus is not allowed to enter the Forge of Creation.
See Also
Zvezda (Celestialsapien home world according to Bandai; non-canon version)