I just noticed something while looking at the stat card of the fire elemental - it, and the 3 other elementals for that matter, are immune to exhaustion.
Condition Immunities: Exhaustion, [...]
Now, at druid level 10, you can spend 2 uses of Wild Shape to turn into one of these elementals.
At Path of the Berserker barbarian level 3, you can go into a Frenzied Rage to make a melee weapon attack as a bonus action on each of your turns until the rage ends (emphasis mine):
Starting when you choose this path at 3rd level, you can go into a frenzy when you rage. If you do so, for the duration of your rage you can make a single melee weapon attack as a bonus action on each of your turns after this one. When your rage ends, you suffer one level of exhaustion (as described in Appendix A).
Since the description of Wild Shape states the following:
You retain the benefit of any features from your class, race, or other source and can use them if the new form is physically capable of doing so.
Therefore, am I correct to assume that if your rage ends while you are in elemental form - regardless of whether you started the rage as an elemental or switched during the rage - you do not take one point of exhaustion?
(Using Wild Shape during a rage should be possible since it's not a spell and doesn't require concentration)
And also, would you even gain the benefits of a Frenzied Rage while in elemental form? I mean, nothing states that they use a bonus action for any of their attacks, and they have multiattack (all 4 types), so you could technically make three Slam or Touch attacks (depending on the elemental), right? Both Slam and Touch are listed as Melee weapon attacks.