Given that in the battle where you encounter them you have to kill 60 of these stupid things, that means a party will earn 1,666,650 XP from the final fight in the game.
Sadly, the C64 caps combat XP awarded in any given battle to 65,280 per character; this means that, assuming a full party of 7 characters, each character loses 172,800 XP (Lagoth Zanta notwithstanding; he's only worth 384 XP).
That's kind of friggin' ridiculous. Sure they're tough, but they are far and away the most high value monster XP-wise in the entire game.
