Okay, so today I had a weird interaction. My opponent played a temporary lockdown. I exiled it later with my Kaya, Intangible Slayer.
This produces a 1/1 spirit token, that should theoretically exile itself. This did however not happen in Arena. Why is that?
Is it a bug or is there a rule that I don’t know?
It only exiles mana value two or less. Temporary lockdown is mana value 3.
To add to this, tokens have no mana cost (mana value 0) unless they are copies, in which case they have the mana cost of whatever they are copying. (There are a few exceptions, like embalm/eternalize, but they’re always explicitly called out)