: His armour, the Mantle of the Leveller
UNGH! Why does everyone thing this Mantle is an actual, physical thing?
A) a mantle is traditionally a cloak or cape, not armor, though armor can be considered a mantle as well.
B) "the mantle of [whatever]" is quite often used frequently, in the same way as "the British crown" or "the armor of God".
When you say someone has the British crown, you're not talking about them literally wearing a crown (do they even actually wear crowns anymore?), but the office of being King or Queen. When you say someone is wearing the "armor of God", you're not talking about some physical or metaphysical force field surrounding them, but a mindset, a state of being.
Likewise, the Mantle of the Leveller is in all likelyhood a figurative thing, representing posession of a person by the transitent divinity called the Leveller. When someone is "wearing the Mantle of the Leveller", they are occupying the office of Destroyer, and possessing the mindset of the evil spirit which occupies them.