cauldron

Neyla and I were running around the center of Ifrit's Cauldron with our NPCs, charming Opo-Opos and turning them loose on the Volcanic Gases like a little remote-controlled bomb squad, when the whole damned mountain exploded. Lava shooting up into the sky and big red rocks falling back down...

I need a wyvern skull to get my opo crown. I've read that they drop pretty frequently. I'm wondering, do people XP on these things, or hunt them for anything other than the skull? I'm wondering what kind of chance I'd have of running into someone killing them and being invited to lot on the drop...