The Changeling

This model has a 4+ invulnerable save.

Each time an enemy unit wishes to select this model as the target of an attack, that unit must first take a Battle-shock test. If that test is failed, in addition to being Battle-shocked, that enemy unit cannot target this model this phase.

At the start of your opponent’s Shooting phase, select one enemy unit within 12" of and visible to this model and roll one D6: on a 2-5, until the end of the phase, each time a model in that enemy unit makes an attack, subtract 1 from the Hit roll; on a 6, that enemy unit is not eligible to shoot this phase