"Yes, well, very good," Molgrug says, confused as to why these supposedly-powerful former lords of evil think it would be difficult to take a bit of crystal from a person who's basically dead and can't even move. "Payment up front though, I'm afraid. Kerapsis, grab that crystal won't you? Don't worry, Dasher, we'll go look for your sceptre."
Perhaps a magic sceptre is worth something in its own right? It sounds powerful, at any rate.
Statblock
Senses: Darkvision 60ft, Spot/Listen +7, Init: +2
HP: 16/16
AC: 17, Touch: 12, Flat-footed: 14
Saves: Fort +5, Ref +5, Will +6 (+2 vs mind-affecting spells, +4 vs poison)
Soulmelds: Mage's Spectacles (1), Lightning Gauntlets (0)
Spells: Command, Resurgence, Obscuring Mist, Sandblast, Detect Magic, Read Magic, Light, Create Water
Special: None