I have a party with a level 10 druid, and she was told she can transform into any elemental.
When the party was injured after a particularly tough encounter, she transformed into Positive Energy Elemental and started making non-lethal touch attacks to the party members, effectively healing them 1d6 health per action (She transformed into a medium elemental, since I wasn't sure, I just made it 1 size smaller for non-core elementals).
Given that this effectively translates to 5 full party heals a day, I am hesitant about whether this is a legal course of action. I know I allowed it once, so I should probably stick with it, but for future campaigns, is this legal?
Assuming I disallow changing into 3rd-Party creatures, which this elemental is, is it advisable that I allow Wild Shaping into non-core elementals, like Ice and Lightning?