d20Dwarf
Explorer
I've looked high and low for the answer to this one.
What makes Damage Reduction either Supernatural or Extraordinary?
In the MM listing it states that DR is either (Su) or (Ex).
The only listings in the MM that I can find that actually label it are under Lycanthrope (Ex) and Vampire (Su). But it doesn't say how the distinction is made.

What makes Damage Reduction either Supernatural or Extraordinary?
In the MM listing it states that DR is either (Su) or (Ex).
The only listings in the MM that I can find that actually label it are under Lycanthrope (Ex) and Vampire (Su). But it doesn't say how the distinction is made.
