When to use catalyst? : r/wow - Reddit
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What type of gear are you using the catalyst for tier (ie, veteran, or higher)? I know it’s player dependent, but I’m curious to see when others will use their tier tokens.
What does using the catalyst does to my gear? : wownoob
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The catalyst is primarily used to make tier set gear. Tier sets are usually some of the most powerful gear you can get on your class, and have a bonus effect for wearing 2 pieces, 4 pieces of it etc.