So there were these skeletal camels running around the edges of my map, scaring dwarves who are constructing a magma pump stack several stories up. So, of course, I decided to dump some magma on them to get them out of there.
Well, it turns out that magma doesn't actually kill skeletons, b/c they can't melt or bleed to death. But they can totally catch fire.
So at the edge of my map was this flaming skeletal one-humped camel with yellow-level burns all over his body. He just sat there, smoking nonchalantly. I thought he couldn't move, but then some elven traders spawned right next to him, and oh wow he proved me wrong. He chased those elves all over hell. And every time he touched a patch of grass or a bush it would burst into flames. His fire caused the fisherberry wine the traders carried to explode in clouds of steam. Almost all the traders died from the fire rather than the his physical attacks, although I couldn't tell if he had to touch them or if the close proximity to the heat killed them. I could only read the reports of this battle, because all I could see on screen was a rolling gray cloud pursuing the elves, and then a trail of bloody corpses when the smoke cleared.
He's still there. On fire. Burning everything. B/c of the way damage works now, with no hit points, I don't think he'll ever actually burn to ash. I wonder if he'll set the rest of his herd on fire...
So it turns out that dumping magma on skeletons is either a really bad idea or maybe like the best idea ever.