Becoming Outsider (Fallen Angel)

[Xar Zarath]

So I plan on turning a wizard into an angel, a fallen one for story reasons. While I could just wave it as "Wizard did it", I rather have a list of spells/feats/stuff or steps on how to make a human character do it.

As a base point, character is Human and 17th level wizard, so how would I turn him into an angel then proceed into a fallen angel?

[A_S]

There's a number of ways to change your type, but since you've already got 17 levels in Wizard, the most straightforward one for you will probably be Polymorph Any Object (http://www.d20srd.org/srd/spells/polymorphAnyObject.htm). Pick an angelic form you like, meet criteria for as many of the spell's duration factors as you can (by raising your Int, temporarily changing your size/type, etc.), and then cast Polymorph Any Object to turn yourself permanently into that form.

As for how to go from there to fallen angel, well..."fallen angel" isn't really a defined game term. Just be creative about what kinds of evil stuff you have to do before you and your DM agree that you're suitably debased to be considered "fallen."

[Xar Zarath]

Any other methods besides the one spell? Also doesn't PAO make you adopt the Int, Cha and Wis of the creature and its mental outlook?

[A_S]

Int: Yes, PAO will change your Int score. Pick a form with a high int score for this reason (as long as you can still meet the requirements for permanent duration).

Wis and Cha: No, you only adopt these if your original form didn't have a Wis or Cha score. As a human, you'll already have your own, so you'll keep them.

Mental outlook: No reason to think this will change. Nothing in the spell description suggests that it changes your alignment or personality in any way (other than changing your Int score, which might have an effect on personality of some kind).

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Other methods: The major rituals described starting on p. 149 of Savage Species. These are all costly and require some DM adjudication. They're also 3.0 material, although since they haven't been updated, they should still be legal.
Retraining your levels (via either negative level + Thought Bottle shenanigans, or via your DM handwaving it and allowing you to trade in Wizard levels), then picking up a prestige class that changes your type to Outsider as a class feature. This won't necessarily make you an angel per se, but if you've got the Outsider type, it shouldn't be too much of a stretch to work with your DM to refluff whatever it is as "become an angel" rather than just "become an Outsider."
DM fiat.

[ShurikVch]

Nar Fiendbond give Half-Fiend template to Humanoid.
It doesn't specify which Fiend it's Half (neither says something like "random Fiend")
Thus it should be possible to be selected by the caster
For example, there are Avamerin from Elder Evils, Rahalar (http://archive.wizards.com/default.asp?x=dnd/mb/20050209a), Adimarchus (http://www.canonfire.com/wiki/index.php?title=Adimarchus), or Malkizid (http://forgottenrealms.wikia.com/wiki/Malkizid)

[A_S]

Nar Fiendbond give Half-Fiend template to Humanoid.
It doesn't specify which Fiend it's Half (neither says something like "random Fiend")
Thus it should be possible to be selected by the caster
For example, there are Avamerin from Elder Evils, Rahalar (http://archive.wizards.com/default.asp?x=dnd/mb/20050209a), Adimarchus (http://www.canonfire.com/wiki/index.php?title=Adimarchus), or Malkizid (http://forgottenrealms.wikia.com/wiki/Malkizid)
If you choose to go this route, there are guidelines (http://archive.wizards.com/default.asp?x=dnd/we/20060630x&page=1) from the Wizards site for how to modify the Half-Fiend template for non-standard Fiendish halves.

Fluff-wise, there's already a type of Fiend, the Erinyes (http://www.d20srd.org/srd/monsters/devil.htm#erinyes), that's supposed to be a fallen angel (you can read more about them on p. 18 of the Fiendish Codex II). So adding the Half-Fiend (Erinyes) template would be a good fit.

[Xar Zarath]

Seems nice, is there anything more?

[Cruiser1]

Seems nice, is there anything more?
Already mentioned are the rituals in Savage Species, which can truly change you from one creature to any other creature (and permanently, unlike polymorph spell effects which can be dispelled, and which go away in an antimagic field).

Similar to the rituals, Savage Species also mentions you can cast Wish to change to a different creature (it's like a ritual, but much faster). Since the character in question is a Wizard 17, they have access to Wish and can turn themselves into whatever (fallen) Angel they want. :smallcool:

[A_S]

Similar to the rituals, Savage Species also mentions you can cast Wish to change to a different creature (it's like a ritual, but much faster). Since the character in question is a Wizard 17, they have access to Wish and can turn themselves into whatever (fallen) Angel they want. :smallcool:
Worth noting: Using Wish as a Greater Ritual is explicitly called out as falling under the "wishing for greater effects" clause of the Wish spell, which requires DM adjudication. The suggestion given in Savage Species is to have the transforming character make Spellcraft checks to see whether or not they get each of the target creature's special attacks and special qualities.

Of course, if your DM follows that advice, you can just cheese your Spellcraft up high enough to reliably make a DC 40 check, and then you're good.

[Honest Tiefling]

Does the character need to be alive for the plot? In many cosmologies, it is implied that fiends are former mortals condemned to the Lower Planes. It would be reasonable to assume, given casualties, that Angels might be formed from holy and pious souls. Is the idea of a powerful character who fell from grace, or someone reaching for more and more power?

[Xar Zarath]

Does the character need to be alive for the plot? In many cosmologies, it is implied that fiends are former mortals condemned to the Lower Planes. It would be reasonable to assume, given casualties, that Angels might be formed from holy and pious souls. Is the idea of a powerful character who fell from grace, or someone reaching for more and more power?

Plot-wise, it's for more power and acquiring a kingdom of demons while being a fallen angel is just part of the campaign. End goal is to control large parts of the Lower Planes for an eventual war with the celestials

[ShurikVch]

Plot-wise, it's for more power and acquiring a kingdom of demonsTemplate "Sign of the Smoking Eye" (Dungeon #107) mark the creature as a contestant for the rule of Occipitus, 507 layer of Abyss