James Gasik
We don't talk about Pun-Pun
Elementals in general have long been a sticking point in D&D. How do you punch something made of air? Grapple something made of fire? Should you be able to burn a water elemental?I'm not sure this is a worse approach than banking on knowing and incorporating a whole bunch of individual eccentric interpretations of what can and cannot happen in explicity supernatural fantasy settings.
E.g. What is the bodily experience and composition of a fire elemental? What is magical fire made of? How do you damage it with swords and arrows, or lightning, etc.
Not to mention people's varying levels of ignorance and understanding of real-world phenomena)
How many snakes slither eye-side down?
Can elementals wield weapons or pick up objects? Wear armor? I don't think any edition has really addressed these points in a satisfactory manner, often leaving it entirely up to the DM to figure out what makes sense to them.