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As the title says, is this compatible with, say, Thunderstone Wraith of the Elements?
Thank you and best
Yes. All Thunderstone products are compatible with this. The "Advance" line has some design modifications so you may want to get only "Advance" titles but the design changes are minimal and a non-issue in my opinion. I mix every Thunderstone product I own together.
FWIW, Towers of Ruin is an excellent starting point as well.