In the treasury he finds a piece of magicite, a powerful magical crystal, only to be discovered by Balthier and Fran, a pair of sky pirates looking for the magicite.
He finds a piece of magicite only to be discovered by Balthier and Fran. This was in the treasury. Balthier and Fran are a pair of sky pirates. These sky pirates are looking for the magicite. A piece of magicite is a powerful magical crystal.