That wasn't the daily heroic. That variant of the mission was to obtain a fragment of the feast or something along those lines. It was a step in the quest for the Touch of Malice.
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Still though, even if it wasn't the daily it still opened up another room down in the bunker and if you have read the lore about the whole Greek mythology it has go something to do with "Promethean" soo just putting ideas out there.