Kibo said:
The +1 is the weapon enhancement, the defender enhancement allows one to choose to apply the magic of the weapon to a defensive act or an offensive act (the default).
No, acording to the ability itself, it
transfers the enhancement bonus to defense instead of offense. It's been moved from offense to defense. It's now a defensive bonus, not an offensive bonus.
But the +1 is an offensive enchantment, and is within the letter and certainly spirit of the rules that it would penetrate DR, and count as a +1 weapon against sunder attempts and all other actions that depend on the enhancement bonus of a weapon.
Since the bonus has been transferred, it is no longer there by the letter of the rules. And I certainly don't think it is in the spirit of the rules for it to still penetrate DR when it's no longer giving you a bonus to attack and damage.
What a person chooses to apply the enhancement bonus to (hit and damage vs AC) is irrelevant, it never changes the fact that it is a +1 enhanced weapon.
It certainly is relevant, since the defender ability
transfers the bonus. It not just "choosing to apply it to something else", it's actually being moved from offense to defense.
Technically it wouldn't even help the hardness or prevent it from being sundered. I don't think that is in the spirit of the rules, which is why I chose to rule it as I did. It's effectively transferred from an (offense) enhancement bonus to a (defense) enhancement bonus, but it's still unnamed as far as stacking purposes are concerned. It seemed the simplest and most fair ruling.
It's not like extra +1 hit and damage from other sources, (weapon focus and specialization) count to reducing DR. It's the magic enhancement of the weapon, not where that enhancement is employed (should one be so fortunate to have a choice) that the rules being discussed depend on.
Actually, yes it is. Like I have pointed out previously, the +1 on a shield doesn't help it penetrate DR, unless it is specifically enchanted as an offensive enhancement.
In the case of comparing the rules for armor enchantment, the item in question is a weapon, and has a bonus to hit and damage as a default, so is clearly enchanted as a weapon. The defender enchantment never changes that, it builds upon it.
Read the defender ability again. It most definitely does change the enchancement. It transfers it from attack/damage to AC. Temporarily, it's no longer an enhancement bonus, it's an unnamed bonus to AC.
Certainly the idea of enchanting a sword as magic armor is interesting, and I can even see stealing that idea to make really interesting weapons. But that's not what a defender is.
That is pretty much exactly what the defender ability is.