There was no doubt that poison man was very strong.
First of all, his basic ability was already heaven-defying, which was the ability to create 'poison' with his body.
Poison man could create new poisons that didn't exist in this world at any time, anywhere, and at his will. The toxicity and effects ... Were all determined by him.
For example, he could create a poison that only targeted humans. This poison was harmless to all other plants and animals, but humans would die once they came into contact with it.
Of course, he could also set the poison so that it wouldn't kill him when he first came into contact with it, but he would definitely die after a while. He could even create long-term parasitic toxins that could not be metabolized by the human body, which could be used to infect and mutate the humans on the entire planet.