The Worst Trade Deal in History is a Legends of Idleon quest: 2 rewards. Buy and sell a total of 10 Golden Dubloons.

The Worst Trade Deal in History | Idleon Toolbox

Buy and sell a total of 10 Golden Dubloons.

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Hold down to gain EXP in the skill that's displayed in the corner of your screen. If you're in a town, you will gain EXP in the town skill. The amount of EXP you get is based on your skill's Lv.

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Hold down to add these gems to your account. You can then spend them in the Gem Shop!