A look at the warcraft novels, RPG books and games.
Glory to person-whose-name-I-dont-know-but-rules-Kul-Tiras!
Isn't there a Blood Elf Druid in one of the TBC dungeons? I guess he's not a "true" druid and is using his powers via technomagical experiments, but why couldn't that be used as a reason? In-game the effects are the same as a natural Druid, but lore-wise a Blood Elf Druid isn't gifted with the power of nature, he/she is mutated via magical experiments.
The Noble Shield
Tharando (Paladin), Arothand (Warrior - Retired), Marbas (Warlock)