The worlds grave has some nasty enemies inside. Use cover and don't go charging in or you will die. Here you meet Shriekers for the first time. This enemy fires deadly missles that sort of bounce around. When they hit you feel it. Two shots from this enemy will likely kill you. Combined with qizards and foot soldiers they probably WILL kill you. Stay back and fire on them only when they are open and spinning around. They close up like a clam and are invulnerable untilthey open up again. Save your ammo whenthey do this and use it to take out those pesky ass wizards!
