cor·rupt
kəˈrəpt
adjective
evil or morally depraved.
"the play can do no harm since its audience is already corrupt"
v. cor·rupt·ed, cor·rupt·ing, cor·rupts
v.tr.
1. To ruin morally; pervert: "The argument that modern life consists of a menu of horrors by which we are corrupted ... is a founding idea of the critique of modernity" (Susan Sontag).
2. To destroy or subvert the honesty or integrity of, as by offering bribes: "Our politics has been corrupted by money and suffused with meanness" (Peter Edelman).
Corrupted is a past participle in reference to something that's already happened. Corrupt is a present participle. You are in the present and have his helmet now. His helmet(a circumlocution of his brain) is corrupt because he was corrupted.
Fiacla-Gear was the Barbarian who founded the
Druid colleges which is why the set has both Barbarian and Druid properties.