Lanefan
Victoria Rules
Well, something's working against it; in that in 40+ years* of playing and DMing 1e-adjacent, and with the Harm spell in the game for that entire period, I think I've seen it cast maybe three times, tops.Eh, Harm was always a combat spell and casting times aren’t particularly off since the spell can be cast in a round in both 1e and 3e. 3e added a saving throw, but the chances of dumping a dragon with hundreds of hit points down to 1d4 hit points in one go was VERY attractive since he was absolutely cake to hit with his sub-10 touch AC.
Harm is one of a whole bunch - as in, hundreds - of possible effects of a wild magic surge, however, and has occurred that way once or twice.
* - of which at least 15 years have been with PCs in play of level enough to access the spell.