Mark was suddenly chosen by a system.  He received a unique skill that will allow him to explore his own personal dungeon.  After a year, he will be transmigrated to another world. Author's Note:=English is my second language so sorry for any grammar lapses.=Constructive criticisms are welcome.=One chapter a day at around 10:00 P.M. EST=Starting Chapter 11, every chapter will be at least 1k words per chapter.=This story is also posted on Scribble Hub. =Please check out my Patreon.  You can read up to 40 advance chapters!