XV02 Pilot Battlesuit

The XV02 Pilot Battlesuit incorporates a Blacksun Filter. Longstrike's TX7 Hammerhead can fire Overwatch and has the Supporting Fire special rule. Furthermore, Longstrike's TX7 Hammerhead is not limited to firing Overwatch once each phase (it can still only fire Overwatch once against each eligible charging unit).

When an enemy unit declares a charge, all friendly models with this special rule in units within 6" of the charging unit's target can choose to fire Overwatch as if they were also targets of the charge. Note that a unit can still only fire Overwatch once each phase.