Hriston
Dungeon Master of Middle-earth (He/him)
For some reason I didn't get a notification of your reply and just noticed it upon reading your post.As I said above, they literally fell into a lake of lava. They would have been fully immersed in the lava and had to swim through it to get out. We're not just talking Anakin lying on the bank of the lava river getting burned by the heat here. Tell me how their items would not have been destroyed.
You've decided the PCs are fully immersed in lava, and I agree, under those circumstances, their items would be destroyed, but then so would the PCs. They would be incinerated just like their items. So as I said up-thread, if that's your preferred narrative, say the PCs are dead but allow saving throws for the magic items.
You've also decided the PCs take less than their maximum hit points in damage, leaving them functionally unharmed. To my thinking, circumstances that would allow the PCs to survive would also leave their items unharmed for the most part. A narrative where the items burst into flames but the PCs do not seems incongruous to me, considering the PCs are wearing the items and thus exposed to the same heat.
Considering there's no saving throw to avoid the teleport trap and plunging into the lava, I'd apply the 10d10 damage, and take the survival of the characters to mean they found some way to avoid the worst effects of the lava, either by landing on a cooler patch of lava or some other object floating therein that shields them from the heat and quickly running across its surface before it can incinerate them. Hit point damage in this case can represent the close brush with death and the singeing of body and belongings. I'd imagine their shoes, for example, would need replacing at the end of the adventuring day.