Something which never made any sense to me is that the objectively beautiful Evil Queen would drink a frightening magical potion which turns her into an old hag, presumably temporarily (but it's barely even implied), with all the risks this entails. What if something about the magic goes wrong and she permanently stays like that? What if the spell kills her in the process, by making her too old/weak?
Why didn't she just pay somebody with less heart and soul than the guy who failed to murder Snow White for her? Why did she have to go through this elaborate process to transform herself and do this all by herself?
The Evil Queen is surely very evil, plotting for Snow White to be buried alive, and clearly torturing and mocking somebody (who is now a skeleton) in her torture dungeon. It's obvious that she must have a bunch of underlings to do her bidding.
The Actual Question:
Is there anything from the source materials* giving indication of the actual reasons she took this added risk by going to kill Snow White in person?
* By source materials, I include not just the original Grimms' Fairy Tales from 1812 through to their final revision in 1854, but anything that indicated the earlier local tales may have covered this, although they were probably almost exclusively passed orally back then.