Bag of Yellow cubic salt

a bag of 40 solid cubes of salt about the size of a cube of suger (size catagoriy tiny) with a yellowish tinge

when thrown this cube grows in size and weight until the size if an adult dragon (size catagoriy huge) or the size of a horse (size catagoiry large)

the tiny salt cubes will reapper in a week once there are no more cubes left.