Doubleyolkeggs

John gets a second chance at life, going back to the time before "The Gate to Another World" appeared. Betrayed in his past life as a pharmacist, he decides he can't trust anyone anymore. So, he opts for a hidden profession, becoming a poison master disguised as a regular pharmacist to everyone else.
To the other awakened ones, John is just your run-of-the-mill potion maker. 
Little do they know, every healing potion he brews is laced with deadly poison.
"John, heal me quick... Fuck! John, what did you do to me? Why have I turned bald?"
"John!!Why did my penis turn into a mushroom after drinking your potion?"
"You guys dare to drink John's healing potions? I saw with my own eyes last time, he threw a bottle of his healing potion and it directly stank a Corrupt Lord to death!"
"And that's nothing! I saw a toxic serpent bite John, and guess what? The serpent got poisoned to death by him!"
John sneered at the collapsed crowd, "I've said it before, though my potions are free, they come with some minor side effects. Want to get rid of the side effects? That'll cost extra!"
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Supreme therapist：My healing potions can even poison the gods

Eartha sighed softly. She thought she would be the only one in the Moonlight City guild who knew John's real name...

This gave her the feeling that it was a secret between herself and John.

But unexpectedly, this feeling was ruthlessly shattered within a few hours.

"John, Zora is still my subordinate. Don't you plan to discuss it with me first?" Eartha snorted, seemingly a bit upset. " How could you have done this? Zora is the best pilot we have."

Zora was indeed Eartha's direct subordinate. Unlike the Star City guild, the Moonlight City guild was established within a military district.

Most of the people there, including Eartha, had a military background.

The military also selected a group of people to form an all-around team to follow the guild's commands.

So, Eartha was Zora's current direct leader.

John gave an awkward smile after hearing this; he could sense Eartha was throwing a little tantrum.

Parasitic Wind-Demon Pterosaur