Crystal Cave

Card Cost: 35 GP {x}
Cardholder using Crystal Cave can play the card after receiving the score from any assignment. Cardholder will earn 10 XP and 5 GP for every percentage point above 70 percent. The Cardholder may retain this card after use, but subsequent uses will require the Card Cost to be multiplied {x} (e.g. 2nd time used = 70 GP, 3rd time used = 105 GP, etc.)