37 cards where the card types include “hydra” and (the colors ≥ R or the colors ≥ G or the cards are colorless) and (the colors are not ≥ W and the colors are not ≥ U and the colors are not ≥ B) and the color identity ≤ GR and the cards have a new frame

Their mind whirled with grand plans, never thinking of what might happen if they got to the end of the list.