So yeah, I was making a suggestion for a halloween spell and posted it, ends up that halloween spells are supposed to be untradable.
I didn't find another issue created for this, so this is it.
According to reddit and other sources halloween spells were made untradable.
"Shortly after that the Tough Break Update made Halloween spells untradeable as an undocumented change, thus removing the loophole of applying any previously existing Halloween Spells."
Sadly, I didn't check that and now I have an open suggestion, which I would like to leave open to get an official statement from one of the moderators.