Board Thread:General Discussion/@comment-31438682-20170318055722/@comment-30514476-20170318235904

Your 600 plus keys should take you more than halfway thru the Sleuth level of Enigma House and pretty close to finishing the quest string.

To finish the challenge you'd have to play Enigma House 150 times, which amounts to 3285 keys. (Fossiliferous has the exact stats on the wiki pages somewhere (maybe the 2015 Xmas one and the locations page?) and mom broke down the numbers in the Flower thread).

Like Minki said, 2500 keys just to go from Detective to Virtuoso. And it'll take 785 keys and 50 plays of Enigma House to reach Detective from Novice.

Getting to sleuth is pretty smooth sailing, reaching beyond that will take some effort but then that's the nature of the beast...the game makes it so that to get the casket you would need to be well into the Detective stage, at which point most people decide whether or not its worth it to then go all the way to Virtuoso and finish the damn thing lol. These past 2 challenges have awarded little prizes along the way as extra incentive to keep it interesting and that was a welcome change. ^^