When you find yourself trying to remember a show (or any works) that's on the tip of your tongue but just out of reach, come here - the collective brain of the TVTropes community can probably help. Post all the details you can remember (examples help). If you're looking for a trope, head over to Trope Finder. Have general questions about tropes? Visit Ask The Tropers!
Medinoc
(Before Recorded History)
2021-04-06 01:09:26
Found it
on the Shapeshifting Squick page.
jormis29
Since: Mar, 2012
TairaMai
Since: Jul, 2011

So there was a trope - I think "shapeshifter backfire" and one of the works was a webcomic where a character is dies because she shifts into the form of a very dangerous character. The boy she was talking to tells her that copying the form of the dangerous character is the same as summoning them. One panel later he's covered in blood as his friends try too help him.
What was that webcomic???
Edited by TairaMai