I've seen this question come up in 2 campaigns involving Druids. Both Gm's ruled that the DR should come with the spell. From a RAI standpoint, it seems obvious, fair, and reasonable, and since it's a 5th level spell for every class that gets it, there's downside to not allowing the DR. Otherwise the spell becomes an underpowered (and so probably unused) choice versus most other 5th level options. On the other hand, what downside is there to allowing the DR?
