Cover Art of Sandman (1989) #7.
*Dream commands John Dee to undo the damage he has created, but there is no reasoning with the madman. The two wage war on a battlefield of dreams while one hundred million sleepers stir uneasily in their slumber. Dee commands the ruby to leech the remainder of Morpheus' essence... and then he destroys the gem. This rash act only unleashes Morpheus' full power, funneling it back into the Dream lord, restoring him to his full might for the first time since his long captivity. Morpheus returns the helpless Dee to Arkham Asylum. *Source: Back of card