if someone wanted to add, remove or change a dragonmark (Abberrant or otherwise) would they be able to do so with True Polymorphing, True Ressurecting, or Reincarnating into new bodies? Or would the Dragonmark just transfer? There is no established way to remove a dragonmark. This canon article calls out that a dragonmark transfers when the bearer changes shape (though it may be inert) and transfers with reincarnation, though the reincarnated character can’t pass it on. https://t.co/21mfB834Oc

— Keith Baker (@HellcowKeith) August 20, 2020

As seen in the novel City of Towers, this doesn’t mean that it’s impossible; a daelkyr or Mordain the Fleshweaver might be able to do it. But there’s no established method and it’s certainly not as simple as polymorphing.

— Keith Baker (@HellcowKeith) August 20, 2020