Lego Horizon Adventures follows Aloy's journey to save her village, pitting her against challenging mechanical mini-bosses, especially on higher difficulties. Among these foes, the Ancient Goop Monster, also called the Deathbringer, stands out as the most formidable. Adapted from Horizon Zero Dawn, this final boss features an alien twist and a prolonged battle with its wide array of devastating attacks. The boss appears after completing all the chapters in the game and culminates the story.