Master of the House of Darts Master of the House of Darts: The House of Darts is an armoury (the darts referring to the throwing spears kept inside). There were actually several of these in the capital: one in the imperial palace, and three around the Sacred Precinct, at the entrance of the causeways that were the only link between Tenoctitlan and the land. The Master of the House of Darts was the commander of the armies, a step below the Revered Speaker himself. He coordinated the movement of troops, decided tactics, and planned the campaign once the Revered Speaker had decided to declare war on a city.