OK on to Deling City. You talk to Caraway's guard and get the map to the Tomb of the Unknown King. Buy the mark.

There's a gunblade only a few screens in. Make a note of the ID #. Keep going. Find the Mysterious Statue and defeat him. Go forward and find the chain by the water - undo the chain to let the water in. Now head to the west chamber. Trigger the switch. Now go out of the tomb, then back in to the center. You'll find Sacred and Minotaur. When you defeat them, you get a GF - Brothers.

Final Fantasy VIII Walkthrough