Extra typed damage and damage reduction

[Jadeite]

Thorn Body wrote:

In addition, your natural attacks and unarmed strikes deal an additional 1d6 points of piercing damage.

Would damage reduction be applied against the extra damage seperately (most likely negating it) or does it only count against the total damage?

[Komoda]

No, one attack roll, one damage.

Now if you have more than one type of mitigator, that may help.

For instance if you have DR 2/Fire Res 5/Elec Res 5 and get hit by a flaming, shocking longsword for 3 fire, 6 elec, 7 dmg your total would be 6 damage.

Fire: 3-5=0
Elec: 6-5=1
Dmg: 7-2=5
-----------------
Total = 6

[Starglim]

Additional weapon damage adds to the total weapon damage for the attack. DR doesn't apply against energy-typed damage, which goes through it but applies energy resistances separately, as Komoda showed.

[Dragonchess Player]

Basically, natural weapons and unarmed strikes do normal damage + 1d6. The extra 1d6 is piercing damage, but the normal damage type for the attack is unchanged; this can be important against certain foes like skeletons (DR/bludgeoning) or zombies (DR/slashing), but normally would not be considered separately. Also note that because it is additional damage, it is not multiplied on a critical hit, increased by size, or included in Vital Strike.