Okay; see below.
Other than the undead and green slime what is immune versus affected? Its been a while so I don't remember everything that is in there.
Giant Toads? Rats? Humans? Giant Crayfish? Bugbears? Ogre? Ghouls? Green Slime? Spider? Anything else?
Been a while for me, too, but it is
the iconic low-level 1e adventure, written by the game's creator. I didn't check the monsters before offering. Maybe there's a bunch of
sleep-able stuff there!
But recall the claim disputed was that "anything you were likely to encounter" would be automatically won if the magic-user got the spell off. Let's not change the goalposts now!
OK, we've got:
SURFACE
Area 1: 6 Giant Frogs, 2 with 2 HD, 4 with 1 HD. Autowin.
Area 4: Huge Spider, HD 2+2. Autowin.
Area 7: Brigands. 8 normal men and 1 2nd level fighter. Not an autowin, but the Die Roller says the m-u wins.
Area 12: Giant Snake, HD 4+2. 50% chance. Die Roller says the m-u squeaked by.
Area 13: 13 Giant Rats, 1/2 HD each. 4d4 are put asleep. Die roller says 9. 4 rats nibble our caster's toes.
Area 16: Giant Tick, HD 3. Autowin.
DUNGEONS
Area 1: Green Slime, 2 HD. Not affected.
Area 4: 12 Zombies, 2 HD each. Not affected.
Area 7: Ogre, HD 5+1. Not affected.
Area 10: 6 Bugbears, HD 3+1. 1-2 are affected. The other 4-5 wail on the magic-user. Die roller rolls low; looks like 5 bugbears to play with our magic-user. How many hit points has this guy got again?
Area 12: 9 Gnolls, HD 2. 2d4 are affected. At least one is there to wail on the magic-user or wake the others. Die roller says, 5 are sleeping and four remain alert and ready to play.
Area 13: Giant Crayfish, HD 4+4. 50% chance. Nope. The die roller says Pinchy is still awake.
Area 14: 4 Ghouls, HD 2. Not affected.
Area 16: 6 normal Guardsmen and 1 Sergeant (6 HD). 4d4 guardsmen are affected. The die roller says 7, so all the normal guardsmen are affected. The Sergeant wails on the magic-user.
Area 17: 12 Guardsmen and 2 Sergeants (as above). As above, but now there are two sergeants. The die roller says 8, so there are four more guardsmen as well.
Area 18: 5th level cleric. Not affected.
So much for sleep as the autowin button for all encounters you could reasonably face. I hope that magic-user wasn't so cocky as to go solo, even with his
Ring of Automatic Sleep At the Start of Each Encounter. Was sleep useful? Sure. Especially if you are guaranteed to always have it available, never be surprised, always have your opponents conviniently bunched up, and always go first. But
even then you'd better consider when it is wise to use it, and have someone else to help you when it fails. And I don't think that "even then" applies to most AD&D 1e games.
So, can we put this "autowin" theory to....err....to sleep?
RC