Hello people, how do we feel about Avid being a witch, bare with me here.
Avid managed to keep the scratch for getting worse for about a decade (yes I know it is role play that doesn't matter here) which is impressive and kinda impossible.
Which makes me think that what he calls alchemy or brewing is actually witchcraft, also he said he used to make potions and weapons for El, my running theory is that he would accidentally enchant them while making them.
When he uses too much magic he gets paranoid and jumpy, warm baths calm you down, avid and drift have a bath (makes no sense but that is a rant for later).
Another thing is that Avid has pinky-purple eyes and weird eye colours are normally a sign of the arcane or supernatural.
Also Avid is almost constantly butting heads with the Doctor (Legundo) because of fear of being found out. And arguing and fighting is a good way to hide fear.
Because in Avid's head doctors have never helped him and have sometimes made things worse, and with everything going on with Avid I'm placing bets that being forced to Kill El isn't the only traumatic experience Avid has had.
Magic and medicine don't tend to mix, and Avid knows this, he knows that Legundo won't believe him , that just like before people will hate what they don't understand or if they do they'll abuse the magic.
Avid isn't stupid, he's scared and hurt, and doesn't know how to ask for help, he thinks that hiding his magic will protect the people he loves because the last time not hiding it hurt them.
Avid is desperately trying to protect others while hurting himself and them because of it.