tx7321 said:
In this case giant class relates to the same races a ranger has a bonus to fight (orc, ogers, giants, etc.).
Mostly.
Here's the breakdown -
"Giant class creatures are: bugbears, ettins, giants, gnolls, goblins, hobgoblins, kobolds, ogres, ogre magi, orcs, and trolls." - 1e
AD&D PHB, p. 24
"Tribal spell casters are found amongst the following races of creatures: BUGBEARS, CAVEMEN, ETTINS, GIANTS, GNOLLS, GOBLINS, HOBGOBLINS, KOBOLDS, LIZARD MEN, OGRES, ORCS, TROGLODYTES, and TROLLS." - 1e
AD&D DMG, p. 40
Add cavemen, lizard men and troglodytes to the "giant class" creatures list, and remove ogre magi, and you have the list of races with tribal spellcasters.
Interesting note regarding cavemen: they have normal clerics, not shamans, so they are not limited in level or spell list like humanoid shamans.
tx7321 said:
So in 1E I wonder what the source of power was for the shaman/witch doctor? I suppose it depended.
Our assumption was that the shaman's or witch doctor's divine spells were granted by the same sources as normal clerics.
A witch doctor's spellbook could be something fun - I used cave paintings and rune strings, as I recall.