Set includes certain equipment items: a helmet, an armor, a melee weapon and a ranged weapon. When you collect a certain set for the first time, you can get a reward.
Starting from the set’s second level, you can activate the set bonuses. To increase the levels of the set, you need upgrade items (spheres and components), which can be obtained from the Faction Wars game activity.
Upgrading sets takes place in Ling’s Forge. You can enter Ling’s Forge in the “Collections” section or in the “Equipment” section by clicking on the set bonus icon.