A pretty self explanatory achievement. Get the fishing rod relic and fish at the areas that sparkle. you need to do this to 5 spots.
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https://www.youtube.com/watch?v=FuLXGLcxu1E
Me getting the Master Shoveler Achievement. To get this buy all the Shovel heads from this guy right here.
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https://www.youtube.com/watch?v=w_qY1qkavSE