
Item: Skull Pauldrons mounted with a pair of slain monster skulls, giving the wearer two extra Head Slots on which to wear hats, helmets, periapts, &c., gaining any magical effects of those items. Both skulls can talk and have their senses (sight, hearing, &c.) but cannot move; the one on the left is Lawful Evil, the right Chaotic Evil.
- offering strategy advice
- mumbling at inopportune moments about their hat being out of style
- complaining about wanting to trade places with the “main head”
- if the party is good-aligned, actively trying to get them killed by yelling to attract monsters
- technically you could also make use of their Eye slots, but do you really want a couple of Evil-aligned liches mounted to your shoulders to have Heat-Ray Vision or whatever
- wily characters might manage to use some alignment-altering magic on them
- general silliness that comes from forcing a character to wear a couple of NPCs around
(source, in case you really want one)