Can you recommend some good 'level system light novel'?

Sure. 'Re:Zero − Starting Life in Another World' can be considered in a way. While it's not a typical 'level up system' in the traditional gaming sense, the main character, Subaru, does grow and develop in power and abilities over time as he faces repeated challenges in the fantasy world he's transported to. Another option is 'That Time I Got Reincarnated as a Slime'. Rimuru Tempest, the slime protagonist, evolves and levels up in a very unique and interesting way as he builds his own monster nation.

One great skill level system novel is 'Solo Leveling'. In this novel, the main character has a unique skill level system that he uses to fight against various monsters. As he progresses, his skills and levels increase, which makes for very exciting battles and character development.

I'm not entirely sure if 'Sword Art Online' can be strictly considered a 'lust system light novel' but it has a great system of in - game mechanics. The story of players being trapped in a virtual world and having to fight their way through different levels is really engaging. It also has elements of character relationships and development which are related to the overall system of the game world.

Well, 'My Next Life as a Villainess: All Routes Lead to Doom!' can also be considered in a way. The main character has to navigate through a world with certain systems in place that can be seen as related to the ntr concept, especially when it comes to relationships and how they develop or are disrupted.

Well, 'The Rising of the Shield Hero' also has elements of alone level up. The hero is initially shunned and has to rely on himself to grow stronger. He levels up through his own efforts and experiences in a world that is often hostile to him.

I'm not really familiar with a specific 'heavy soverign system light novel'. But you can try searching on some popular light novel platforms like NovelUpdates. They usually have a wide range of novels and might have what you're looking for.

Sure. 'My Dragon System' light novels often feature unique dragon - related concepts. One popular one might be the one with a protagonist who discovers his dragon system abilities and uses them to save his world. It usually has elements of adventure, magic, and character growth.

One popular 'monster level up light novel' is 'So I'm a Spider, So What?'. It follows a girl who is reincarnated as a spider in a dungeon and has to level up to survive. Another is 'Overlord'. The main character, a powerful mage, gets trapped in a game world as his in - game character, an undead king, and he and his minions level up in various ways.

Sure. 'I Alone Level Up' is quite popular. It has an interesting story where the protagonist overcomes various challenges to level up alone. The world - building in it is fascinating, with unique monsters and magic systems.

Sure. 'Overlord' is a great one. In this novel, the main character has a powerful system and there are elements related to building and ruling in a sort of 'farming' way, like developing his territory and his minions. Another is 'Release that Witch'. The protagonist uses a system - like knowledge from his past life to develop the witch - dominated territory, which involves farming resources, training troops, etc. And 'My Isekai Life' also fits. The main character uses his cheat - like system abilities to farm for materials and grow stronger in a new world.