Becoming a Magian
Some interpreters suggest that whoever sees themselves transforming into a Magian in a dream, it may indicate that they abandon Islam by committing immoral acts.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam
Note: These are traditional scholarly interpretations (ijtihad) drawn from a specific classical source — not a binding religious ruling, fortune-telling, or a prediction of the future.