Apotheosis : Lich and Fiend

[Waldham]

Hello, I have a question about a character turning in a lich with the eternal apotheosis ritual and that accomplished the fourth apotheosis to become a fiend.

If the fourth apotheosis ritual fails, the character is slain. Can the character to raise as a lich ?

Thanks for your future answer.

[Tacticslion]

I don't know the rules answer to this, but can I request information about where the rituals are from?

[Waldham]

From occult realms and book of damned.

[Bjørn Røyrvik]

By RAW it seems that as long as the character is raised before attempting lichdom, it should work. At least I couldn't find anything saying it can't work.

Personally, I would not allow both of these rituals to be attempted by the same character.

[Waldham]

In 3.5 there are a template lichfiend from Libris Mortis, it was possible in 3.5.

[Diego Rossi]

I wouldn't allow you to try it in that order (lich and then fiend), but I would allow you to become first a fiend and then a lich.
The fourth apotheosis replaces your race and the half-fiend template. You need the half-fiend template for it to work.
But the half-fiend template says:

Half-Fiend wrote:

“Half-fiend” is an inherited or acquired template that can be added to a living, corporeal creature with an Int score of 4 or more. A half-fiend uses all the base creature's statistics and special abilities except as noted here.

When you become an undead the half-fiend template isn't applicable anymore, so you fail the requirements for the fourth apotheosis.

About the original question:
A lich isn't slain the normal way. You need to destroy its phylactery to permanently kill it.
Probably your infernal patron has the power to do that if you fail your ritual. If he would do that depends on the patron and how good a servant you were.

[Artofregicide]

Do you want Devourers? Because this is how you get Devourers, Lana!