Immutable Existence
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Not to be confused with Immutable Form
Immutable Existence makes the user immune to effects like 
Polymorphed. Furthermore, the user cannot be removed from this plane of existence.
Description
Spells that alter someone's form have no effect on the affected entity, and it cannot be removed from this plane of existence.
How to learn
Used by creatures:
Notes
- Prevents any condition in the Polymorphed status group as well as
Banished