Infantry models in this detachment gain the Move Through Cover and Hammer of Wrath special rules. In addition, on any turn in which they declare a charge from within a terrain feature that grants a cover save (not including any terrain piece purchased as a Fortification choice), they gain the Furious Charge special rule. Note that units which contain models with any variant of the Bulky special rule do not benefit from this special rule.
A force whose primary detachment has Chapter Tactics (Mantis Warriors) may re-roll failed attempts to Seize the Initiative where this is a factor in the mission being played. In addition, any Mantis Warriors Librarians may generate Psychic powers from the Divination discipline instead of the disciplines listed in Codex: Space Marines if the controlling player chooses.
If a model with this special rule ends its charge move in base or hull contact with an enemy model, it makes one additional Attack that hits automatically and is resolved at the model's unmodified Strength with AP-. This Attack does not benefit from any of the model's special rules (such as Furious Charge, Rending etc.). This Attack is resolved during the Fight sub-phase at the Initiative 10 step, but does not grant the model an additional Pile In move. If a model with this special rule charges a building or vehicle, the hit is resolved against the Armour Value of the facing the charging model is touching. If a model with this special rule charges a building or vehicle that is a Transport or a Chariot, the hit is resolved against the building or vehicle, not the occupants or the rider.
A unit that contains at least one model with this special rule rolls an extra D6 when rolling to move through difficult terrain and is not slowed by charging through difficult terrain. In most circumstances, this will mean that, when moving, the unit rolls 3D6 and picks the highest roll. Furthermore, a model with the Move Through Cover special rule automatically passes Dangerous Terrain tests.
In a turn in which a model with this special rule charges into combat, it adds +1 to its Strength characteristic until the end of the Assault phase. A model that has made a disordered charge that turn receives no benefit from Furious Charge.