Plague Flies

Plague Flies are a supernatural breed of insects and antagonistic forces in dark fantasy film The Last Witch Hunter.

Overview and Creation
Plague Flies, also known as "Sarcophaga Samanos or "Musca Mali", are products of Plague Tree, a supernatural plant conjured by a dark and forbidden spell known as The Chant. When the Plague Tree is fully grown, the Tree would formed enormous fruit-like hives of these flies. These hives would constantly glow more and more brighter with more flies grown within. Once the chant is almost completed, the swarm of these flies would be released, and attack any humans on sight and spare witches except those whom stood in the conjurors’ path.

Aside The Chant, Musca Mali can also produced through other dark spells. At least one of such spell was involving booby-trapped a victim with a bewitched object that should the victim touch the said object, their innards would produces a swarm of full-grown plague flies that killing them from the inside and flew through their orifices. The instance can be seen in the first film where when a soldier of Axe and Cross tried to took his axe, the said axe turned out to be bewitched that it grew spikes, causing him suffer internal bleeding before breathes a swarm of Musca Mali. Other dark conjurors such as Belial and Ellic had their own batch of plague flies of their own, but it appeared that they conjured the flies with other similar spell without need of booby trapped victims with bewitched object.

Appearance and Abilities
Musca Mali might be looked like a deer fly, but if one looked closely, they had abdomen that vaguely resemble that of bees’. Also, the claws on their feet are possibly razor sharp, as they can easily dig through a man’s skin like a bullet to release the supernatural plague that they carry with them.

Plague within a fly can kill the victim in two days from infection, but a swarm would instantly killed him in mere seconds.

What made the flies feared was the plague that they carry. Due to supernatural in nature, the plague is incurable by medical means since the conjuror must be killed to save the victim.

Countermeasures
Since both fly and the plague it carry are supernatural in nature, the only way to both cure the victim and kill all present flies is by killed the conjuror before it is too late.