Talk:Spell Progression Tables/@comment-2601:2C0:4580:6BC:E0D2:3C1A:E944:50F7-20180325205727/@comment-1855630-20180326092036

In classic versions of the game, that's as high as it will go; in Enhanced Editions the formula is just ([level]-8) so you are able to reach the maximum caster level of 20 at level 28.