DM David writes about “The Dungeons & Dragons spells Gary Gygax never meant for players.” “Dungeons & Dragons first supplement, Greyhawk, raised the game’s highest level spells from 6th level to 9th. None of Gary Gygax’s players had reached the level required to cast the new spells.
Tim Kask remembers that as he and Gary worked on the Blackmoor supplement, they figured players faced little chance of even reaching level 9 or 10. ‘This was before the gross inflation of XP’s and the corresponding levels. The highest level player in Gary’s Greyhawk campaign was level 7 or possibly 8 at that time, and they had been playing more than any other group with the possible exception of Dave’s.’”