What happens
The Prince of Morocco arrives at Belmont to try the casket test. Portia explains the stakes: whichever casket he chooses correctly will grant him her hand and fortune. Morocco examines all three caskets—gold, silver, and lead—and reasons that the gold casket, inscribed "Who chooseth me shall gain what many men desire," must contain Portia's portrait. He chooses gold, opens it, and finds a death's-head with a scroll inside. The scroll mocks him for valuing outward show over substance. Mortified, Morocco departs.
Why it matters
Morocco's failure reveals the casket test's true nature: it is not a game of chance but a test of character and wisdom. His elaborate reasoning about gold—that it represents desire and that Portia, desired by many, must be within—sounds intelligent but misses the play's central lesson: that ornament deceives. The very length and eloquence of his speech about why he deserves Portia through birth, fortune, and love works against him. He proves himself capable of sophisticated argument but incapable of seeing past surfaces. His confident choice of gold demonstrates how easily flattering logic can seduce the ambitious, and how the play equates vanity with blindness.
The scene establishes Morocco himself as sympathetic even in defeat. His opening plea—"Mislike me not for my complexion"—dignifies him before the test begins, and his graceful exit preserves his dignity even as the scroll humiliates him. Yet Portia's relief at his departure, expressed in language that notes his darkness and distance from her, complicates any simple reading of his nobility. The scene raises uncomfortable questions about beauty, race, and power that the play never fully resolves. His failure clears the way for Bassanio, the "right" suitor, but the mechanism of his elimination—clever wordplay disguised as divine judgment—suggests that the casket test rewards those who already belong to Portia's world, not those who truly deserve her.