glass
(he, him)
jmucchiello said:This is a no-brainer. The worst spell I've ever seen was in the Tome of Magic for 1e AD&D. It was called (and someone will correct my spelling) Hornung's Guess. This 1st level spell could tell you the order of magnitude of the number of things you could see. So the field commander looks to the wizard and says "How many enemy troops are filing through the trees?" and the wizard casts this spell and responds "Well, between 1000 and 9999 troops and that doesn't include any of the troops I can't see because the trees are in the way."
Another contender from the ToM (which I am pretty sure was a 2e book by the way) was Nahal's Reckless Dweomer. Pick any spell from your books, and apply that spell to th 'wild surge' table. It gave about a two percent chance of casting the spell as intended, or it might create butterflies, or heal you enemies, or render the caster unable to speak...
glass.