Disenchanters derive additional nutrition from enchanted objects they eat akin to dNetHack disenchanters.

Magicbane’s usual special effects don’t happen when a disenchanter is being hit by it.

Disenchanters’ touch attacks can cancel individual items in your inventory (not just armor) as well as merely reducing the enchantment of armor. Or possibly add a new R monster that has this ability, and leave disenchanters as they are.

When a disenchanter hits you, it may drain charges from your wands instead of your armor.

Eating a disenchanter corpse sets Pw to 0.

Disenchanters can eat magical items for food like incantifiers do (i.e. draining the magic out of the item, leaving it as uncharged/cancelled/+0 or turning it into a mundane counterpart). This works for disenchanter pets, and for players polymorphed into them. Not specified whether this should give the player intrinsics.

Possibly, add a ‘magivore’ monster flag to represent monsters that can do this, though if only disenchanters are capable of doing this then it may not be needed.

Rust monsters and disenchanters are quadrupeds, and should be q. (This would leave R empty though.)