Which main characters in novels could travel through time and space at will and have an exchange system?

Blake, a pro gamer and the winner of the Zetron gaming competition for the MMORPG Lord of Legends meets his doom together with few other participants or so he thought. Together with others, Blake gets summoned over to a world of fantasy and magic filled with danger and mysteries. However, to go back, they have to fulfill the job of wiping away a foreign civilization that threatens the existence of both the infinite realm and earth

Waking up as Space Marine from Warhammer 40K is crazy enough but living in the world of Sword and Magic is beyond crazy. MC has no idea how he ends up in a fantasy world similar to D&D but one thing he is certain, he has to survive and find out who took him away from his home. I do not own Warhammer 40k or picture for fanfiction cover. Please enjoy this fanfiction and if you are interested in Warhammer please check youtube or google for lore.

My first language is not English, and the grammar is bad. Mc is a degenerate and don't expect anything good from him. That yes, he adores his wives. It is My first fanfic, the mc, it will travel through different parts of the world of the universe of anime, manga, Japanese and Chinese novels, etc. Manipulative MC. MC female finder, great harem. He will not hesitate to manipulate to get the girl he wants. The protagonist complains a lot about the rest of the MCs in the other novels. He will not hesitate to sexually blackmail women that he hates or is his enemy. Lots of time jumps, I'll try to be as accurate as possible, spelling mistakes I'll try to correct over time. Hypocritical MC sometimes. The story begins in the real world, he is born in China, but then he is sent to Japan and grows up there. Current worlds, real world, devil 2, oregairu, avatar. He will have the ability to summon some characters from League of legends, but he will not go to that world, this fanfic will NOT focus on the world of Diablo 2, which is part of the system. This fanfic was created for self-satisfaction.

A young man who finds himself in TDG world as a nephew of the city lord, with a powerful method to cultivate the strongest law, and beauties around him. However, the protagonist isn't here. How would he achieve his dreams then, with all of the possible dangers this world offers.

When I died I didn't expect to wake up with dark beings of immeasurable power looming over me. I didn't expect to be given new life in a brand new world. Now, armed with a powerful system that makes me stronger after every fight, I might be the last thing standing between the multiverse and absolute annihilation. As I complete quests, defeat foes and become stronger, I still don't know if I'll be able to save this world, my old world and all the worlds in between. "And below... the MAW beckoned..." Come check out the discord to speak to the author and other readers: https://discord.gg/BEJgcRVVev

She had been lonely and helpless in her previous life and ended up being wronged and imprisoned. Now that she was reborn with a precious heirloom bestowed on her, she activated an alternate space and became a doctor after absorbing all medical knowledge within. As she opened her own clinic, set up her own company, purchased houses and lands and found her birth family, her worth and social status rocketed and attracted more and more suitors. “Master, that chap from the Zhao family pretended to be sick and went to seek treatment from the future mistress yesterday…” said one of the servants. “Break his legs and injure him inside out! He wants to be sick? I shall make him sick for real if that is what he wants!” said the man unhappily. “Yes, Master. But…what are you doing now, Master?” the servant asked curiously as the man swallowed a bunch of expired food. “I am sick now. I need to seek treatment from my wife,” the man pretended to be weak and said.