Protonic Inversal Axe

The protonic inversal axe is a weapon in the Fallout: New Vegas add-on Old World Blues.

Characteristics
It's a special version of the proton axe, having a dark blue-violet blade, white-pinkish capacitors and a brownish handle. It is a very effective melee weapon dealing out high damage.

The weapon has a special VATS attack called "inversal scarifier" which is unlocked at Melee Weapons 50, costs 35 AP, and deals double damage.

Locations

 * The Cuckoo's Nest, found on Test subject 1
 * Big Empty, found on Number 27 and Number 34, ghouls near Little Yangtze.
 * Big Empty, can be found on lobotomites.
 * X-13 Research Facility, found in Test Chamber #2, on the walkways to the right of the elevator (Hard Lock door)

Appearances
The Protonic inversal axe appear in the Fallout: New Vegas add-on Old World Blues.

Behind the scenes
The name of the protonic inversal axe is likely a reference to the 1984 movie Ghostbusters, as "total protonic reversal" is the outcome of crossing the streams.