Gear items improve your hero stats and are necessary to rank up your heroes.
Note: Several heroes need the same items to upgrade. Be careful when equipping an item and double-check if you are upgrading the desired hero.
Some equipment is fairly easy to create: you just need to gather enough item fragments, combine them into an item, and it is ready to be equipped. For example, the Enchanted Lute is such an item, and you need five fragments to create it.
Creating complex equipment is a multi-step process. To craft a complex item, you need to combine several items into one, meaning you need to create lower-tier items by gathering their fragments first. For example, the Siren's Song is such an item, and you need one Enchanted Lute (i.e., five Enchanted Lute fragments) and one Siren's Song — Recipe (i.e., 20 Siren's Song — Recipe fragments) to create it.
As you can see, complex items resemble nesting dolls: they consist of multiple lower-tier items, comprising even smaller items or fragments.