Honestly, I don't know why I waste my time on you, but here you go:
The Ring-bearer cannot be discarded or returned to your hand, and skirmishes involving the Ringbearer cannot be cancelled.
The rule was created after the advent of Alternate Ring-Bearers. Cards like
Curse Them or
Boromir's Gauntlets would allow a player to cancel a skirmish with
Isildur, Bearer of Heirlooms or something else. The game had been considering it for a while because of cards like
Filibert Bolger, Wily Rascal that were NPE.
O Elbereth! Githoniel! is still a legal card because it adds other gametext to the game that can be used...the strength +1 or the ability to take off the One Ring; however, canceling skirmishes with the Ring-Bearer is against the rules.
Here is a link to the CRD which I highly recommend that you read before your next game or LotR TCG-related comment.
-wtk