As a zombie, my adventurer is very successful. No-one except a very confused mummy will talk to him and a single townsperson attacking him tends to end with the entire town converted to huskdom, but unfortunately, after numerous escapades, every single bone in his body is broken. While he can still kill things, he must crawl everywhere and swims twice as fast as he shambles.
To make it even more fun to play as an unkillable dust-monster, I have an idea! When a husk enters a dust cloud of the type that husked them, the arcane forces of the dust replaces any missing body-parts, but in skeletal form only. And the bones are not naturally regenerated - they are made of the dust that spawned them, in my adventurer's case they would be a verdant green. I think this would have a few interesting gameplay effects, not counting "making husk adventurers have a way to heal badly":
1. Husk adventurers now have a "safe ground" that they are encouraged to return to, and so do un-controllable husks. Perhaps their AI could be set to "protect their biome", caring for the land that raised them.
2. Husks can heal! Aaaaah! Luckily, the dust body parts would be prone to scattering even on weak impacts, spreading the husk-dust and destroying the limb. You're still doomed, but after a while, the husks will get weaker while never dying like they're supposed to.
3. If they lose all original body-parts, they die (or get bisected). Imagine the creatures this could create, like the following scenario:
STORY THAT'S SUPPOSED TO MAKE YOU THINK HOW COOL THIS WOULD BE
Protected by a magic artifact amulet, or a space-suit (either works, we suppose), you grit your teeth and plod into the cursed dust cloud, looking for the creature you've been tasked to kill. More dead than alive, and more undead than dead, the ancient no-longer-bones of the Forest Titan tower before you, making no noise as its dusty joints squash together in motion. Your visor is beginning to cover with the bright pink dust, but you've spotted it - the eye of the beast, the only part remaining of its former life, squirming in its prison of cloying powder. You lunge for it. The titan's worn pink skeleton, held together only by the most vile of magic, blends in seamlessly with the whirling plume, but the eye sticks out like a sore thumb. As you smash away its limbs, they are whisked away by the cloud and reform almost immediately, but it's too late. With a sickening thunk, your steel whip smashes its lost eyeball to sprecht, and the monster collapses immediately. You have slain the Zombie Titan of the Forest, but you are not yet safe... the dust is clogging your ventilation system, and you feel faint...
Obviously, that was a future goal. But wouldn't that be cool?! We'd get even scarier husks, more weak points and stuff that would look pretty cool if it wasn't in ASCII!