Do Dances Up Earthquakes' Impending Power Cards count as being in hand, play, or discard?
No, impending cards are set aside out of play until they accumulate enough Energy to be played. They can't be played (except by Rhythmic Powers Builds to a Cataclysmic Crescendo), can't be discarded, and can't be reclaimed. They also don't count as being in play for, e.g., Earth Shudders, Buildings Fall or Gift of Seismic Energy.
