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Those magical light curtains called strange doors connect to another world. On the other side of the strange gate, there is a mysterious city with strange magic, and an Iron Dynasty that is rejuvenating the country with science and technology; There are peoples who live in the ice and snow, and there are also legendary craftsmen who work with lava; There are the arrival of mythical beasts from ancient epics, and there are also mechanical generals who can match a hundred with one; There are sword fairies who fly with swords, knights who defend to the death, the mysterious power of elemental mages is spreading, and planes made of psychic gems are soaring. This is the Age of Strange Doors! It's also an era full of wonders!

The era of national martial arts! The age of the witcher! A giant beast entrenched in the wilderness! The conspiracy hidden in human civilization! This is the era of chaos and chaos! This is the era of heroes rising!