Hello, I have a question about the hellfire wyrm from Manuel Monster II.
The hellfire wyrm has a surnatural ability : fiendish form.
Fiendish Form (Su) : At will, a hellfire wyrm can produce an effect like that shapechange, except that only the normal form of any tiefling or devil may be assumed
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So, is it any kind of devil ? It is not a unique form of devil. For example, erynie and not in gelugon.
Is it possible to create a similar dragon for the demon ? what will be the spell like abilities and summon Tanar ri ?
Thanks for your future help.