Athos comes through again.
"…about the body of Saruman a grey mist gathered, and rising slowly to a great height like smoke from a fire, as a pale shrouded figure it loomed over the Hill. For a moment it wavered, looking to the West; but out of the West came a cold wind, and it bent away, and with a cold sigh dissolved into nothing. …long years of death were suddenly revealed in [the body], and it shrank, and the shrivelled face became rags of skin upon a hideous skull."
Saruman's death: Shippey suggests that Saruman represents a character 'eaten up inside' by his desires. —The Return of the King, p.363
Don't miss this link to Athos' link HERE
Whether this scenario is one that I Wun will face directly or not I don't know but we who are following in his shadow will certainly witness to the many deaths.