The Mutalisk is the Zerg basic flyer unit. However, unlike the Wraith and Scout, it is very effective at ground attacks as well as air. It is also one of the few air units that has a Light armor type giving it much more survivability against the numerous Explosive anti air attacks in the game. Mutalisks are also a little cheaper than other air units, but it has the smallest attack range for an air unit.

Its attack has a special type of Splash Damage in the sense that it doesnt hit multiple targets in its line of fire. Instead, the attack will bounce off its initial target to another nearby target and deal damage. It can also hit a 3rd target if a enemy is close enough to the second target. Each hit will reduce the amount of damage done by half. Thus the second target will only take 50% damage and the third will take 25%.