

Removing the Void Aura using a Death Knight Bane spell will liberate the aura of a knight that has one, making all of their non-invulnerable friends immune to the according element.All Knights are invulnerable (because of Void Aura) but they can be destroyed with the Death Knight Control Wand that you get from killing Leandra.A wave spawns one turn after being announced.

The first wave is announced after 2 turns.Each wave is "announced" before it spawns: a blue pillar of light announces a blue knight, etc. Leandra's Army consists of 3 waves of Death Knights.
