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One of the best features in Destiny 2 is the Public Event system. This idea has it roots as far back into MMOs as Warhammer Online in 2007 and 2008 when the game launched. Destiny 2 has taken the model and adapted it for players to boost their experience and leveling while exploring the narrative zones. It also brings in players from around the zone to join into an epic battle. One more thing, there are heroic versions as well.