Any Daemonic unit (including Daemonic monsters and characters) that starts the Magic phase with a model within 6" of Alarielle is affected by the aura of law and harmony that surrounds her. Each unit in range suffers D6 Strength 5 hits that count as magical attacks.
In addition, roll a D6 for each magic item belonging to a model from a Chaos, Skaven or Undead army within 6" of Alarielle at the start of the Magic phase. The magic item is destroyed on a D6 roll of a 6 (roll for each item separately).