Going through Tomb of Ice, and it calls for some lettered tiles I don't have, and I'm especially suspicious because the tile letters are "a" and "b" that I don't have, when I do have "g" and "f". Which expansion should those be in? (The only one I don't have is Sea of Blood.)

Thanks

All the lettered tiles are from Tomb of Ice . There should be a total of eight reversible room tiles (A-H), each 4x4, with connectors in different positions. Note that they each have "indoor terrain" on one side and "outdoor terrain" on the other.

I had a hunch that was the answer, guess it's time to email customer support.