I would like to leave my suggestion, perhaps creating equipment with a new rarity, in which This equipment would be part of a complete set of armor where it would have many powerful attributes of the game and would have passives next to the equipment that would work when the whole set was complete, A nomenclature of this rarity , Mítica !!!!!
These sets would have a shiny appearance and each would have a kind of aura around the armor if fully completed.

It would be the hardest parts to get in the game !!!!