SPoD said:(EDIT: Never mind, no need to belabor the point.)
At any rate, if memory serves, my black box Basic D&D "Master" set (coincidentally ALSO released in 1984) went up to level 36, so I don't see how 30 levels is some sort of new-fangled heresy.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.