If the Order fails and the world is destroyed, what happens to the Blood Oath?

[hamishspence]

Again, the unfulfilled Blood Oath for Roy is "not a problem for us" ie LG in the case of Roy. But it is a problem for them in the case of Eugene. Because of his lackadasical approach to fulfilling it. Nowhere does it say they can't let him in becasue the power of magic is greater than them, they are chosing not to because he did not fulfil his Oath. Not even trying to.

I think the point is that "died trying" overrides any magical power the oath may have.

The person swearing the oath, is saying "I will not rest (living or dead) until it is fulfilled".

The Deva lets Roy in becasue it is in her power to do so. Which means logically, a Chaotic Deva, whatever that is, should have similar powers over whether you are up to the standards of Chaotic, geas or no.

And since Devas are a subclass of Angel, and Angels are Any Good

https://www.d20srd.org/srd/monsters/angel.htm

I think it's safe to say that Chaotic Good realms will have some Chaotic Good devas.

Ysgard (OOTS's Valhalla is the nearest equivalent) is a Chaotic plane, leaning toward Good:

https://www.giantitp.com/comics/oots1136.html

and we know from this that Thor is served by deva. There's a strong implication that Thor's associated with Valhalla.

Presumably, these are Thor's Deva minions:

https://www.giantitp.com/comics/oots0201.html
https://www.giantitp.com/comics/oots0353.html

and they are presumably CG.