Stalker

If this model is reduced to 0 wounds, roll a D6 before removing it from the battlefield and before any embarked models disembark. On a 6 it explodes, and each unit within 6" suffers D3 mortal wounds.

Once per game, instead of shooting any weapons in the Shooting phase, this models can use its smoke launchers; if it does so, until your next Shooting phase your opponent must subtract 1 from any hit rolls that target it.

This unit has the following abilities: And They Shall Know No Fear, Bolter Discipline, Shock Assault and Combat Doctrines.’