When a Daemon casts a spell from the Lore of Tzeentch that causes one or more unsaved Wounds, choose a unit of Pink Horrors or Screamers within 12" of the caster, and roll a D6 for each Wound caused (excluding Wounds caused by the Warpflame special rule). If it is a unit of Pink Horrors, add 1 model to the unit for each result of 4, 5 or 6. If it is a unit of Screamers, add 1 model to the unit for each result of 6. Models are added, one at a time, to the back rank. If the back rank is full at any point, or the unit has a single rank of at least five models, the next model starts a new back rang. Models that cannot be placed (because there isn't enough room, or you do not have sufficient models) are lost. Models created in this way have no upgrades and do not award additional victory points.