This is my anser cause other guy didn't tell you
Ok first go though the sewers and hit him with water blah blah blah then when you reach the end you'll find a tube with water in it (closed) now...
What we know as "sandman" is actually a timeless, Celestial being. They have one purpose: Messenger. Messenger in Celestial is Tzuvial. Tzuvial is summoned by any angel, demon, abraxis', humans,...