Eye for an Eye Defeat Mr. Eye with only Nether based weapons (which include the Netherbeast and the Netherblades).

The skill point is based on an old legal principle in which a criminal is punished the same way the victim of the criminal was treated, sometimes in a literal sense (such as having one's arm cut off after cutting another person's arm). In the Eye for an Eye skill point, Ratchet retaliates against the Mr. Eye's Nether attacks by striking Mr. Eye with Nether-based attacks (Nether based guns, like the Nether Blades and the Netherbeast).