Any unit that Ghazak Khan declare a charge against can only choose Hold as a charge reaction. This does not affect units that have Immunity (Psychology).
Any Hobgoblin unit within 6" of Ghazak may re-roll the initial D6 for Treachery or Hobgoblin Animosity tests. In addition, if Ghazak Khan is your army's General, units of Hobgoblin Wolf Riders count as Core Units.
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Cavalry (Special Character, Hobgoblin)