Before leaving Uhra for the first time, go inside "The Great Gate - Inside the Tower". You will find a guy beside the elevator named Colen. He is looking for a soldiers helm. After learning some clues, take the elevator up then down. Now, after getting off the elevator, guide Kaim to the right. Ram should be the action command available. Do so and the helm will fall down. Pick it up and Colen will approach you and will reward you with an Antidote Brooch.