Destiny’s final three Calcified Fragments are actually hidden in King’s Fall’s time-gated Challenges

Bungie has reaffirmed "Challenges" coming to both the Normal and Hard mode versions of Destiny: The Taken King's end game raid, King's Fall.

Bungie actually confirmed these Challenges in response to a tweet containing a quote from designer Luke Smith talking to Edge Magazine (via MoreConsole). "There's also Challenge mode – a particular way of killing a raid boss that gets you a special emblem and reward," Smith said. "Mathematically, you've onlys een or completed five-thirteenths of the raid." Of course, this quote was probably before King's Fall's Hard Mode version was released.

To date, 47 of the 50 Calcified Fragments have been discovered in Destiny. It was previously believed these final three fragments would be hidden in the raid's hard mode, but looks like that's not the case. Thanks to Smith, we now know where the last three are locked behind these Challenges which are not yet active. Although Luke Smith promises more info about these Challenges will be shared "in several weeks," he did reveal that at least part of these rewards will be the final three Calcified Fragments.

Finding these Calcified Fragments is actually part of a questline that ultimately rewards you with the highly coveted Touch of Malice (which requires you discover 45 of them). We don't yet know what discovering all 50 will reward you with, but I'm fairly positive it'll be another powerful Exotic item.

Challenges being time-gated is just another example of Bungie's goal in year two to not only keep Guardians invested in the game, but to also limit the randomness of acquiring certain Exotics. Like Sleeper Simulant and Black Spindle, completing these Challenges will probably be a mystery. However, once you discover how to complete them, you'll probably be rewarded quite nicely.