1) Is there a possibility to put a certain color of socket into an Item or is all that up to luck? Use a Chromatic Orb to change the colors of an item's sockets randomly. Once you recruit Vorici into your hideout, you will also gain access to a crafting table which allows you to select which colors you want. 2) In my Skill tree I found a "Jewel Socket" passive. What is that for and is it worth getting? You can put a special type of item called a jewel in there. Jewels come in magic, rare, and unique variants and can have all sorts of modifiers, so you can use the passive point to get various benefits suited to your character. Whether it's worth it depends on whether you have a good jewel to socket in it. You get a unique jewel as a reward for a quest in Act 2 by the way. 3) There's Maligaro's Spike in my inventory which I can neither use nor sell. If it's a quest item, do I have to carry it around or may I put it into my stash? Yes, it's a que...
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