Rainbow Queen Dragon

0: You may play this card by Riding cards whose costs are equal to this cards . When this card dies , return it to the Drop Zone .
+1: Create a 1/1 Dragon token . (its an Artifact creature with : Sacrifice this card: One Dragon gains 1/0 Power .
+4: Destroy all non-Dragon cards on the field , then lose 4 Life , and each player who lost cards draws one card .