They ranged from the amazing but unrealistic (a new planet) to the truly terrible (an emblem) to somewhere in between (a legendary or exotic sword). The current puzzle (credit: see image)The Vex Mythoclast is a hugely beloved Destiny 1 weapon that was the original exotic raid reward from the Vault of Glass after killing Atheon. So if there is a weapon reward for the quest, that seems likely. This is a purely Vex based puzzle and this entire season is based around Vex and Cabal without Hive anywhere to be found. The Vex Mythoclast is another story.

Source: Forbes January 19, 2020 13:18 UTC