Illusion: Tree does not turn you into a tree 100% of the time. This was tested on an enchanter and both the caster and others no longer see you as a tree. It does, however, root you.
Illusion: Tree off Illusionist Stone is also broken.
This may be related to this bug:
https://www.project1999.com/forums/s...d.php?t=352789
However, I created a separate topic due to the fact that it is a druid spell in question and that it only fails sometimes.