Corrupted Egg
From Curious Expedition 2 Wiki
The corrupted egg can be collected by encountering the wandering duke after entering a mysterious portal into the corrupted lands. To obtain this item, you must trade him two edible items that vibrate together, which can be found in his offering tab. It has a value of 20 gold and 30 ribbons and only forms a stack of 1, even if multiple are acquired. This item is usable within a range of 2 and has a radius of 2.
