D&D 3.5's Complete Arcane introduced the Orb of Fire/Acid/Whatever line of spells. They are conjuration spells (normally you might expect them to be evocation), they do a reasonably large pile of damage, ignore spell resistance, and even work through antimagic fields.
I have occasionally heard rumors from very different sources that one of the authors of Complete Arcane had a favorite character who was a conjurer with evocation banned, and snuck the Orbs in for advantage for that character.
See for example @HeyICanChan's first comment on his answer here, though I have also heard it from other forums and from offline friends who have no apparent connection to here or the other forums.
So: Where does this idea come from? Was there an interview where the author said or implied this was the case?