Warpmeld Sacrifice

Each time an enemy unit is selected to shoot or fight and one or more Tzeentch Mutant Infantry or Tzeentch Mutant Mounted units from your army are selected as a target of one or more of those attacks, each of those Tzeentch Mutant units can make a Warpmeld Sacrifice. If it does, until the end of the phase, each time an attack targets that unit, subtract 1 from the Wound roll. At the end of the phase, that Tzeentch Mutant unit suffers D3 mortal wounds.

Each time a Tzeentch Mutant Infantry or Tzeentch Mutant Mounted* unit from your army is selected to shoot or fight, before selecting its targets, that unit can make a Warpmeld Sacrifice. If it does, until the end of the phase, each time a model in that unit makes an attack, add 1 to the Wound roll. At the end of the phase, that Tzeentch Mutant unit suffers D3 mortal wounds.

Tzaangors units from your army have the Battleline keyword, and while such a unit is not Battle-shocked, add 1 to the Objective Control characteristic of models in that unit.