The Breacher Team is another type of T'au Fire Warrior deployment. Drawn from the most aggressive members of the Fire Caste, Breacher Teams specialise in brutally effective close-range assaults, clearing buildings of threats in a tight, tactical formation and delivering sharp, shockingly sudden frontline displays of raw incendiary power that grind enemy soldiers into dust, discharging Pulse Blasters and hurling Photon Grenades until they are certain every path is clear.

-W40k Lexicanum