Responses
dungeons/system/monster taming: https://www.mangago.me/read-manga/the_s_classes_that_i_raised/
game becomes reality: https://www.mangago.me/read-manga/the_player_hides_his_past/
where the world gets flodded with dungeons or where a game becomes reality. im also searching for stuff with system wich makes mc op and monster taming or evolving stuff tysm