https://www.polygon.com/2018/4/17/17246996/monster-hunter-world-new-elder-dragon-dlc-kulve-taroth

Monster Hunter: World players will need to coordinate at much larger scale if they want to tackle the newest in-game event: a battle with golden Elder Dragon Kulve Taroth.

The latest creature to join the ever-growing Monster Hunter universe, Kulve Taroth’s battle is part of the the game’s new Siege quests. Players must split off into separate hunting parties (which hold up to four) from the same Gathering Hub to investigate and repel the shimmering beast, which means up to 16 people can participate in the same quest.