The Usurper

The Usurper's goal is to become the Ruler by
landing the killing blow to the current Ruler.
They then reveal their role card. Instead of dying,
the original Ruler is reduced to 1 life and acquires
the Usurper role card. The Usurper's life total
then becomes that which the Ruler started with
(even if that means losing life) and the Usurper
becomes the new Ruler. The Knight's allegiance
changes immediately, as does the Bandits' target.
The old Ruler becomes the new Usurper.