I'm trying to get the rat king, and was wondering if it's still the same way to do the riddles or if it's different
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You have to have at least one other person with the Rat King quest in your fire team. Then you complete two public events, two pvp matches, two heroic strikes then complete a Nightfall. (You don’t need anyone for Nightfall). Go into guided games for Nightfall and complete the Nightfall. Rat King will drop when you complete the Nightfall. The wait for guided games by yourself for the Nightfall will be about a twenty to thirty minutes.