Slaver wasps

Slaver wasps are biomechanical mind-control devices created by the Other. They come sealed in large devices known as hive engines, and someone who has been infected by a wasp is called a revenant. These revenants, as well as the wasps themselves, are programmed to recognize and obey the Other's voice.

Sparks and Jägermonsters are apparently immune to the effects. Usually.

There are no known instances of a revenant ever being cured, though apparently some can live a normal life if not exposed to the command voice.

Tactics
Once a hive engine is activated, a number of "warrior" wasps swarm out to secure a perimeter while the "queen", which is part of the engine, generates the smaller wasps that carry out the actual infection. Anyone caught within this perimeter is herded toward the engine and immobilized.

When the swarm is complete, it is released in one burst to seek out all potential hosts.

List of known revenants
Note: This is EXTREMELY SPOILER-RIDDEN, for obvious reasons. Be sure you're caught up.


 * Mr. Rovainen
 * The surviving population of Passholdt (mutated version)
 * The entire population of Sturmhalten
 * The Geisterdamen
 * Klaus Wulfenbach