[3] The druid, previously appearing in the Greyhawk supplement as a monster, is expanded in Eldritch Wizardry as a sub-class of the cleric, presented as a neutral-aligned priest of nature worship.

[3] Eldritch Wizardry presents a modified combat system which utilizes new rules such as the type of armor for each character, weapon readiness, encumbrance, and level of spell being used.

[3] The book adds new wilderness encounter charts which also take the new monsters into account as well as the character classes included in the previously published game supplements and issues of The Strategic Review.

[3] Eldritch Wizardry was written by Gary Gygax and Brian Blume and published by TSR in 1976 as a sixty-page digest-sized book, and was the third supplement to the original D&D rules.

[3] He felt that, like the Greyhawk and Blackmoor supplements before it, Eldritch Wizardry introduces new material to the basic D&D game system "for a more intricate, complex playing experience.

[3] Taylor called the physical quality of Eldritch Wizardry "excellent" and the artwork "superb", and felt that the book was "well worth the admittedly high price", concluding that it is "as good as Greyhawk, and that's saying a lot.