Complex sentence: Cassie's team aids Kahn in recovering Shinnok's amulet, leading to Mileena's execution, but the team is betrayed by Kahn in order to keep the amulet in Outworld's hands.
Split into simpler sentences: Cassie's team aids Kahn in recovering Shinnok's amulet, leading to Mileena's death. The team is betrayed by Kahn in order to keep the amulet in Outworld's hands.