[Bananadine]

I tested the hit point change. I tried hitting an earth elemental (sent via Earth Attack) with a 70-ish strength Kick attack. At large sizes, the elemental always changed from its maximal HP at its current size to its maximal HP at the next size down. But at around size 3, it started to take more damage than that. Once, for instance, I saw it change from 26/26 HP at size 3 to 1/18 HP at size 2. The number that appeared over it was 25, suggesting that that number is just (old HP) - (new HP). But later, the same elemental went from 1/18 to 1/10 in one hit, and the number that rose from it was 2. I don't understand that. Maybe its never-healing wound was involved (it had one of those; the penalty for the affliction changed from -3 to -2 due to the size change). I don't know. But damage does seem to carry over, at least sometimes.

Later, I tried casting Opposition on assassinating earth elementals. Once I got that spell to bring a healthy, size-5 elemental to 1 HP at size 4. Maybe the damage carries over but is cut off just before it would otherwise trigger a second size change. I mean, I guess only one form change per unit per attack is allowed.

Next, I tried casting Soul Slay on several Lamia Queens. As with Opposition on the earth elementals, this spell always brought its targets from perfect health in their first form to 1 HP in their second form.

Finally, I tried burdening a Lamia Queen with quickness, a curse, a horror mark, barkskin, and soul vortex before slaying her soul. Her second form still had all of these attributes.