Red Province City,
Wizard Police Headquarters,
Wizard Mitchell released his vine healing particles into Captain Tyler's blood stream. When he observes with his mental senses, he finds the bloodstream is filled with purple particles.
In other words, these purple particles were the result of Leon Willy's mucus magic. It finally begins to corrode the bloodstream.
If it were a normal human, he would have died even with a slight contact of mucus poison magic.
The reason Captain Tyler is able to sustain so far is because of his level 4 Wizard strength. On top of it he is a physique wizard. Both of the combinations provide strong resilience to the foreign threat.
When it comes to other level 4 wizards, it's impossible to say what would have happened in the end, if they were contaminated with such poison.
