Brage's Body must be picked up when Brage is killed, and carried back to Oublek in Nashkel to complete the side quest The Tale of Captain Brage, unless you choose the Brage's Life Spared completion to that quest instead.

Brage's body weighs 105 lbs, which may be a problem for groups without a sufficiently beefy fighter sort (such as Minsc) to carry it.