One use only. Except in a turn in which he charges, an Assassin can place an Infernal Bomb anywhere along his path during the Movement phase or, if in a unit, anywhere along the path the unit has travelled. A model can place an Infernal Bomb and march. Announce your intentions to drop off an Infernal Bomb and mark the spot (a coin will do). The model and/or unit that places the bomb must set the bomb and move away. Once placed, an Infernal Bomb cannot be moved.

The owning player can choose to explode an Infernal Bomb at any time except during the player turn in which it was placed. However, an Infernal Bomb that would explode with its template touching the model that placed the bomb or any member of his unit cannot be detonated. When triggered, an Infernal Bomb explodes on a D6 roll of 2+. On a roll of 1, the Infernal Bomb is a dud and does not explode. Perhaps the Warlock Engineers have betrayed you? If it does explode, place the large round template centred on the counter. Any model at the template's centre takes a single Strength 10 hit, causing D3 wounds. Any models touched by the template suffer a Strength 3 hit.