Mutated poison
The subordinate of Saint who came to greet Muscle was stunned.
This is on top of the shock that came with Muscle's visit.
Muscle is a person who is very stubborn and stayed very true to his words. He hates Saint's guts and nobody is unaware of that. He made sure that everyone who comes into contact with him from within the organization understood that.
For that reason, Muscle never even bothered to come and get healed by the hands of Saint. Every fellow subordinate gets a special token from Saint because of the rule from Mountain master.
When that token is used, Saint has to come and heal no matter what. No price taken, no charge, no excuses.
That token could be used on themselves or any other people they wish to us it on.
Muscle who has never visited Saint to get healed, has a ton of tokens left. And it seems like he is utilizing some of them at the same time. Which is actually a really bad news to Saint.