I'm not sure specifically as I haven't read it in detail. But generally, a 'poison healer' in a light novel might be about a character who uses poison in an unconventional way for healing purposes, perhaps with a unique magic system or set of skills related to it.
The 'redo of a healer light novel' focuses on a healer character. The healer in this novel is given an opportunity to start over. This could be due to a tragic backstory where they were unable to fully utilize their healing abilities or were persecuted for some reason. During the redo, the healer will encounter various challenges and opportunities. They may discover hidden powers within themselves or find new ways to use their healing skills. The story might also explore themes such as redemption, power - up, and the changing of destinies.
It's a story about a healer who gets the chance to redo his life. He uses his new - found knowledge and power to take revenge on those who wronged him in his previous life.
One common plot element is the search for an antidote. When poison is involved, the healer is usually on a quest to find the right ingredients and spells to counteract it. This often involves exploring the Forbidden Forest or delving into ancient potion books.
One interesting 'Harry Potter' fanfiction could be about a healer who has to deal with a mysterious poison outbreak in Hogwarts. Maybe a student gets poisoned in a strange way, and the healer has to race against time to find the antidote using their knowledge of both magic and potions.
One characteristic is the focus on the power of healing. The healer characters often have to deal with various wounds and diseases in the story. For example, in many healer light novels, they can use magic or special skills to cure the sick or injured.
I'm not entirely sure as I haven't read it specifically. But generally, a light novel often involves a unique story world, interesting characters, and a plot that could range from adventure to fantasy. It might be about a healer character's journey, perhaps facing challenges in a magical or fictional setting and using their healing abilities in various ways.