Where do you find a power armor power supply on adventure quest?

If you are doing the quest for the attic imp in the inn, you press help(in the top-left corner). He'll say he found a secret garden. Then, in the place where it had the button labeled 'help', there will be a button labeled 'go'. Press the 'go' button, and you'll get into the garden. The first monster will be a Drakel Power Scout. There is this little blue light thing behind his helmet. Press it and you'll get the Power Armor Supply!!! Good luck!