This odd-looking weapon has both sharp and blunt sections. Its pommel or grip is set with a diamond, a piece of jet, a sapphire, and a ruby. In addition, it is inlaid with both adamantine and silver.

When you score a successful hit with a transmuting weapon against a creature that has damage reduction, that attack is resolved normally. At the start of your next turn, however, the weapon transforms, taking on the properties required to overcome that creature’s damage reduction.
Once so changed, the weapon overcomes the designated type of damage reduction for 10 rounds, or until you strike a creature that has a different type of damage reduction. In this case, the weapon transforms in the same manner to overcome that damage reduction instead. If the target has multiple types of damage reduction, the weapon overcomes all of them. If the creature gains a new type of damage reduction after initially being struck (from changing its form, for example), the weapon must change again before it can overcome the new type.
A transmuting weapon does not gain any other benefit of the properties it takes on, and it always deals normal damage.

Prerequisites: Craft Magic Arms and Armor, fabricate.
Cost to Create: 4,000 gp (plus 300 gp for base item), 320 XP, 8 days.