What creatures are hurt by obsidian?

[Gonzoron of the FoS]

Last session, my party acquired some obsidian daggers. They want to make some monster lore checks to see if they know what creatures are especially vulnerable to obsidian. I know they exist, but I can't remember which ones.

Anyone know offhand?

[Zettaijin]

Didn't one of the new lycanthrope variants in the MCIII have a wekness to obsidian weapons? Werejaguar or wereleopard perhaps?

[Dion of the Fraternity]

It's pretty much open. Personally I think that Mesoamerican-type creatures should be hurt by it, such as yes werepanthers.

I don't tend to use obsidian as a weakness, however, as I give the creatures themselves the ability to use it in their own weapons.

[Rotipher of the FoS]

It's the recommended vulnerability for weretigers in VRGtWB, as an optional replacement for silver. Werejaguars are vulnerable to ebony, not obsidian.

[lostboy]

You could also rule that Obsidian being volcanic glass and sharp as hell could do additional hp's pf slashing damage, although perhaps its susceptible to being shattered?

[Tykus]

It's the recommended vulnerability for weretigers in VRGtWB, as an optional replacement for silver. Werejaguars are vulnerable to ebony, not obsidian.

Actually, one of the 2 versions of the werejaguar was affected by obsidian. And several Athasian monsters (Dark Sun) were affected by obsidian (but they wouldn't know much about those creatures).

[Sorti]

Weretigers, per RCS (I'm pretty sure, my players are in Sri Raji now )

[Epically]

Isn't it obvious? White walkers.

[Zilfer]

HA!

[Dion of the Fraternity]

I suppose technically any living being can be hurt by obsidian daggers.

[vipera aspis]

Orphans

[alhoon]

I had obsidian bypass the dementor's DR. You know the dementors from Harry Potter make nice Ravenloft monsters. With DR to obsidian.

[Resonant Curse]

There are rules for obsidian items in the Dark Sun books. Yes, they break more easily.

[Zilfer]

I was checking up on this in Pathfinder as well because they do have obsidian and it seems that they break easier..... but! Magic Obsidian weapons don't have the fragile quality.

[Rotipher of the FoS]

While it's counter-intuitive that it'd be weretigers, not werejaguars, that obsidian would harm, it does make sense from a Rule-Of-Scary perspective. Lycanthropes' damage resistance is supposed to make them more frightening, after all, and a werejaguar's typical victims would be from Mesoamerican-style cultures in which obsidian would be a very common material for ordinary weapons. It wouldn't be very scary if a classic European werewolf had DR/steel and could therefore be taken down with normal swords, would it?