The more-apocalyptic scenario is Katsina's interpretation of what would happen. She could, of course, be misleading everyone else for her own ends, but her Con skill is non-existent. People are free to roll Judge Intentions if they like.
Let's roll Ohanzee's Magical Artifacts knowledge skill and see what he thinks. No modifiers since he would have been thinking about this pre-damage.
Logic 3 + Magical Artifacts 4:
??Ohanzee isn't really sure. There's a part of him that doubts that such a potent magical artifact could even be destroyed by earthly means. Wouldn't that require some sort of crazy ritual?
@PoindexterSam can see:
1) the Bulldog (he can probably see a driver, an ork in the passenger seat, and a troll in the back
2) an elven woman staggering from the Bulldog to the Tata Hotspur
3) a troll standing behind the open passenger side door of the Hotspur
If Sam joins Ace he will walk through the growing cloud of whatever gas the grenade is giving off.