Fail-safe Detonator

Use this Stratagem in any phase, when a battlesuit model from your army is destroyed. Before
removing that model from play, instead of using
any rules that are triggered when that model is destroyed (e.g. the Explodes ability), roll one D6
for each unit within 3" of that model, adding 1 to
the roll if the destroyed model has a Wounds characteristic of 12 or more;
On a 3-5, that unit suffers D3 mortal wounds; on
a 6+, that unit suffers 3 mortal wounds.