The Forest Pendant is only good once you get it to +100. +100 is the maximum amount of times that you may combine things together. Once that happens on the Forest Pendant, it morphs into something else with stats such as looting, power, toughness, gold drop, etc.
Now, what I'm curious about is... what on earth the "Cooking" bonus does xD
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Nothing at all!. Just trollin' you by making you fill that bonus up to get to the good stuff.