Is there a Fallen Angel Template?

[ericgrau]

I thought devils were already the spawn of fallen angels: https://en.wikipedia.org/wiki/Fiend_...ons)#Blood_War

Half-fiend is a simple way. Another simple way would be if perhaps the angel simply becomes a devil. Even half-fiend requires some DM fudgery because the savage species rule says there has to be some kind of ritual or special thing that makes an inherited template happen after birth.

Option 3: Simply change your alignment to Evil, as allowed by RAW. For most purposes besides behavior and spell selection you're still an angel. Detect spells ping you as both good and evil by RAW (one from type, one from morals). Roleplay the corruption. Your offspring OTOH, might be half-fiend or etc.