Challenge Mission. There are nine quarry sites. The northwest site is guarded by a Luxon Enchanter and is where you spawn. The other eight are guarded by a Shadow of Kanaxai. By killing a Shadow of Kanaxai, a Luxon Enchanter spawns and you gain control of that quarry site. Likewise, when a Luxon Enchanter is killed, a Shadow of Kanaxai takes his place. In addition to the quarry guards, groups of enemies attack in waves. The frequency and number of attackers increases over time. Every 10 seconds your score increases by the number of quarry sites you control.