Complex sentence: As the orcs celebrate, Lothar swoops in on his gryphon and kills Blackhand in single combat, avenging his son and his king; against Gul'dan's wishes, the orcs, bound by tradition, allow him to depart with Llane's body.
Split into simpler sentences: As the orcs celebrate, Lothar swoops in on his gryphon and kills Blackhand in single combat, avenging his son and his king. Against Gul'dan's wishes, the orcs, bound by tradition, allow him to depart with Llane's body.