Mortifiers

When a model in that unit is destroyed, roll one D6 before removing it from play. On a 4+ it metes out its final vengeance, and each enemy unit within 1" suffers D3 mortal wounds.

When a model in this unit would lose a wound, roll one D6; on a 6 that wound is not lost.

When you choose this unit to shoot with in your Shooting phase, you can choose for heavy bolters that models in this unit are equipped with to have a Type characteristic of Assault 3 until the end of that phase, or for heavy flamers that models in this unit are equipped with to have a Type characteristic of Pistol D6 untili the end of that phase.