I believe poison is anything detrimental to the body regardless of the intended purpose of the drug or substance.
An example is a painkiller such as paracetamol that could cause damage to cells and yet still many people gulp them down like sweets.
Now what if one wanted to poison you ,said individual simply needed to have a basic understanding of your habits such as which pub does he frequent, which prostitute does he usually patron, does he have family, a wife perhaps, all this is to find the best opportunity to strike but in my situation the best opportunity to poison him.
But if poison i could easily find was enough to kill a peak apprentice mage then there wouldn't have been a need to give the mission to an entire team.
...
John Sanders at the age of thirty five years was a peak apprentice mage under the blood river gang and as expected, complete scum . from murder ,rape ,extortion ,slave trade to even chimera experiments, this bastard has dipped his fingers in it all .
With his only hobby being drinking and a night stop at the blossom pavilion to meet his favorite whore ,he didn't have much of a life. At least that's what Azrael thought as Alan was giving him information until he reached the part about Chimeras and hesitated a bit ,thinking that the boy was probably scared as it was one of the few laws since the inception of the empire that were strictly regulated by the empire's law enforcement units ,he encouraged the boy to continue ," don't worry, no one's snitching here ": and in great detail Alan explained how he bought slaves as test subjects or how he simply got some beggars and orphans when he lacked money and how he'd gotten a taste of younger girls . by this point I'd already moved from calling him a lecherous old man to a sick pervert.
...
On the third day of the three days agreement just as dear old John was going to the blossom pavilion along the river he bumped into a kid rapped in bandages.
At first he thought of lashing out at the kid and killing the vile spawn where it stood but he suddenly felt a sharp pain on his arm. Upon looking at his arm, a sense of crisis enveloped him sobering up his drunk ass .a sharp incision had been made on his arm and the area around the wound had turned blue yet what truly sobered him up was the fact that he was quickly losing feeling in his arm and he felt dizzy. By now as a somewhat competent researcher in biology, he knew he'd been poisoned and to make matters worse ,a poison with unknown symptoms, to be precise unfamiliar symptoms. Ashe tried to collect his mama in his arm , a sharp pain passed through his entire body as he fired off a fire bolt that Azrael easily dodged .as the fire ball struck the water it exploded like a grenade and flash bang at the same time.
Between him dodging and the fireball going off only a second had passed by ,the end of which found Azraels blade piercing the skin of his neck.
Though under the influence ,having never been formerly trained in combat , he was still speak mage apprentice with reflexes better than a normal house cat hence he managed to to partially dodge the blow with a single cut to the neck that was somewhat deep but not life threatening in the least and with in seconds the wound was cauterized in that split second as he split his focus to close his wound and make sneer a blade appeared out of his gut as he tried to dodge. The blde missed the intended target ,the heart yet still struck the liver and in that sane second as his liver was punctured he watched as the figure in front of him turned in to a shadowy figure and disapeared .
By now he couldn't even feel twenty percent of his mama , it seemed the boy had sneered some of the weird poison in his blades ,the fucking brat.as such thoughts were passing through his mind , his own shadow pierced through him, such an inconceivable thing happening never crossed his mind as the dark attribute wasn't known to control shadows.
As he died a smile appeared on his mouth as he might be the first to witness such a scene.