You take the pot of grass and place it on the pedestal. The door opens, you walk out onto a field of grass and see a void, with floating numbers, making it look like a clock. You walk towards it, but realize you are stuck. You look down to see that the grass had morphed into vines and are wrapping around you. As they reach your waist, breathing becomes harder, and harder, until you pass out, thinking "The answer to the riddle, was..."