Medusan Roar [Aura]

Adeptus Astartes model only. While an enemy unit (excluding Monsters and Vehicles) is within 6" of the bearer, each time that unit fails a Battle‑shock test, one model in that unit is destroyed (chosen by its controlling player). Once per battle, when such an enemy unit fails a Battle‑shock test, you can choose for D3 models in that unit to be destroyed in this way instead.