Effect: Player motion radar is removed.

Location: Within a minute or two from starting the stage, players will encounter the outskirts of a destroyed city. On the right, there is a flaming office building. Atop the roof, there will be a Flood soemthing that will jump across the street (roof to roof ala Predator). Shoot the enemy as he is jumping and the skull will generally be flung off the roof and onto the street (restart if
you miss or if the enemy escapes). Multiple players firing on the enemy helps ease the pressure of any lone gunman.

Locate the Covenant comm array to get your bearings straight. Head into the city from that landmark. The skull carrying alien appears. It will appear after the checkpoint and before you proceed onto the street (any player but not the A.I. Arbiter). Normally, you aim near this spot and hose the guy before he makes his jump. Having more players around increases your chances of killing this guy as soon as he appears.