These units are converted from hydralisk.They burrow and they atttack!Their damage is splash and they are also inisible.With these combination these creatures can become very dangerous predetors.These units are very suitable for dropping also.When you send them to kill the workers, after few seconds they eridicate them.Lurkers are very suitable for setting traps to the enemy.You can make a surprising attack and also you can draw the enemy army to the lurker trap location the enemy army will be vanquished by your hidden ravenous Lurkers.