David L. Arneson, Plaintiff vs. Gary Gygax, Tactical Study Rules, a partnership consisting of Gary Gygax and Brian Blume, and TSR Hobbies, INC., a corporaton, Defendants (1979).

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