Theres a lot to grasp in this game, and nobody will be able to better explain it in one reply until you play the game to understand their explanations. For example, Prismatic is a wizard talent. You can find legendary affixes +x prismatic, but it’s a talent which is found on a specific item type for wizard which will change your element type on attack to another randomly (thus defeating a specific immunity/resistance). Another way to do this is the affixes Weaken or Ignore Resist. As you can see, answering your open ended questions is not a simple thing. Try reading these guides I’ve attached below. Search the forums, the answers are here 95% of the time, and others are more inclined to answer more specific questions if you show you have tried to find an answer first
