oc transported to another world fanfiction

[Dimensional Magic Cube's Instructions] [1. The Dimensional Magic Cube can automatically absorb the energy that exists in the dimension. Once a month, it can randomly open a dimensional channel and perform dimensional travel.] [2. The Dimensional Magic Cube has the ability to convert various powers from different dimensions, ready to be activated and used at any time.] [3. There is a storage space inside the Dimensional Magic Cube, which can be opened and used at any time.] [4. ...] This is the story of a man who once couldn't choose his own future but vowed to live for himself in this new life. Carrying the Dimensional Magic Cube, Riezel arrived in the world of swords and magic and wandered through different worlds, hoping to find a new beginning. === In a nutshell, a story about a man from Earth who got transmigrated into a fantasy world (original world that acts as the main world) and has the ability to travel to various anime worlds to become stronger. Visited Worlds: 1. Danmachi (Is It Wrong to Try to Pick Up Girls in a Dungeon?) 2. Demon Slayer (Kimetsu no Yaiba) 3. Overlord 4. Fate/Grand Order: Fae Round Table Domain - Avalon le Fae === Support and read advanced chapters at: patreon.com/VALRRR