Scourge

The Scourge serve as kamikaze-attack flying units, capable of causing 110 damage to aerial targets. Like Zerglings, Scourge spawn in pairs from a single Larva and can be produced in mass numbers in a very short period of time.

Their low vitality (HP) and inability to hit ground targets make them vulnerable to attack and therefore they should be used with stealth and caution so that they can best achieve their destructive potential. They prey easily on lone or small groups of enemy air units, but they lose their usefulness against larger groups of aerial units capable of counterattack.

To get the most of the Scourge, use them in combination with Mutalisks, Guardians or Devourers. The Scourge can quickly even the odds in the favor of an already established Zerg air force and with the Mutalisks/Guardians/Devourers there to absorb most of the damage from the enemy, the Scourge have a much better chance of a successful attack run.

Scourge acquire their targets very quickly and if used to patrol key areas, can be useful for putting an end to an enemy drop tactic. However, in the battlefield, all available Scourge may lock onto a single target and may simultaneously attack, resulting in a huge waste of resources for only one kill. As a result, you should either keep a watchful eye and tight control on your Scourge groups or separate them into pairs in case of auto acquiring as well as for easier management during a heated battle.