Hidden Chest 3
Shown in Report
There is a chest hidden containing 25 KringleCoins and a Hint for the Smart Contract Objective.
Objective Image
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Challenge
Solution

After finding the chest (NPSL (Outside Elfen Ring)) you will get following hint:

Merkle Tree Arboriculture

You're going to need a Merkle Tree of your own. Math is hard. Professor Petabyte can help you out.