Everyone:
1. All cards that a released are legal as of their public product release date.
2. Promos that are not released in public products are not legal. I.E., Galador, Protector of Straywood IS legal, because it has been released in an actual public product, whereas Healing Wand is NOT legal, because it has NOT been released in a public product.
3. Thus, all cards in these products are legal: Core set, Spell Tome 1, Spell Tome 2, Forcemaster vs. Warlord, and Conquest of Kumanjaro.
I think that's all. Hope that clears things up.