I cannot get the crystal in the level 20 ,the crystal is covered by the pyramid shape and the pyramid shape has 3 hold around it

How can I get it please help me . Thanks in advanced

Make sure you have have gotten the three Flower of Shade items on the each of the upper levels first. Then go all the way back up to where the three Circles of Death are, just outside the entrance. Lay one flower on each circle and then go to the Circles of Life and pick up the flowers that have appeared there. Once you have all three, go back to the pyramid and place one flower on each of the little pyramids, and tada! The big pyramid opens and you can pick up the crystal. It looks very cool. :)