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There are two promo cards for Shadows of Brimstone Derelict Ship.
These are 2 artifact cards:
Promo-160 - Mine Artifact Void Grenade
Promo-161 - Derelict Ship Artifact Dark Stone Prism
They are available when purchasing the Derelict Ship Expansion direct from Flying Frog (also at Kickstarter) or at conventions.
No prices tracked yet for this game.