What does the godslayer blessing do?

[TatsumakiKara]

While DMing a game, I needed a quick NPC mercenary, so I went to the NPC gallery and pulled the first one that looked okay. Almost the PCs level, but not quite (not meant to be a challenge, but only half the party was able to go on a stealth mission). And what I got was this:
http://www.d20pfsrd.com/bestiary/npc-s/npc-5/Rupert-Raim

Of course, my PCs ended up killing him, but now that they have his stuff, I'm wondering what the godslayer blessing does. I tried looking it up, but couldn't find anything. Is it like the Divine version of 3.5's Magebane enchantment?

[Xexyz]

My Google searching leads me to believe that it's homebrew, since the NPC in question is from someone's homebrew campaign. The closest official thing that matches would be the Thanatotic Titan's godslayer supernatural ability.

I'd also say that the fact it's written as a blessing and not simply a property of the weapon implies that it may not be a permanent enchantment.

Any which way you look at it, it would appear that you're on your own here. Personally I'd just say that once the NPC wielding it died the blessing on the sword ended, leaving the PCs with a regular +1 longsword.

[niconorsk]

Yeah, that definitely sounds like a homebrew enhancement. But yeah, treating it as a bane(divine casters/beings) weapon doesn't seem entirely unreasonable.

[TatsumakiKara]

Thank you both! I may just keep it as a divine caster bane, since they already have a rogue with Magebane on his crossbow, might as well make it even :)

[T.A.U.]

Goggling I found that it's not from a homebrew campaign, it's from Pathfinder Cronicles NPC Guide.

There is a boon for that particular NPC: He can give to the PCs the ability to gain a free casting of Godslayer spell on a weapon.
That spell works like the Bane weapon ability but only against divine spellcasters and outsiders serving a deity.