Wyches

If your Army Faction is DRUKHARI, units from your army with this ability can become Empowered Through Pain. This is done using Pain tokens.

GAINING PAIN TOKENS 

If your Army Faction is Drukhari, you gain Pain tokens as follows:
■ At the start of the battle, depending on the battle size:
COMBAT PATROL -  1 PAIN TOKEN
INCURSION - 2 PAIN TOKENS
STRIKE FORCE - 3 PAIN TOKENS
ONSLAUGHT - 4 PAIN TOKENS
■ Each time an enemy unit is destroyed, you gain 1 Pain token.
■ Each time an enemy unit fails a Battle-shock test, you gain 1 Pain token.
Each time you gain a Pain token, keep it to one side – this is your Pain token pool.

EMPOWERED THROUGH PAIN

At the start of any phase, you can expend one or more Pain tokens from your Pain token pool. Each time you do, select one unit from your army with the Power from Pain ability. Until the end of the phase, that unit is Empowered, and gains the  abilities listed below, depending on the phase.

■ Empowered in the Movement or Charge phase:
◦ You can re-roll Advance or Charge rolls made for that unit.
■ Empowered in the Shooting or Fight phase:
◦ Each time a model in that unit makes an attack, you can re-roll the Hit roll and, if it is a melee attack, improve the Armour Penetration characteristic of that attack by 1.