Who's Got the Key

I once drank, from a crystal stream. Where on the bank, I did dream. Of emerald sky's, with diamond rain. N that i could fly, with angel's wing's. Cloud's of silver, blew over a turqoize sea. With a golden tower of tranquility. Then as the heaven's opened up to me. Hord's of deamon's, I did see. Across the mountain's, over the sea. Out from the shadow's, they staired at me. Then as I flee at an alarming rate. They called for the key. To get in the gate