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Essence
Essences are a type of currency item. They are dropped by essence encounters. Essences will upgrade a magic item to a rare item, similar to a 
Regal OrbRegal OrbStack Size: 20Upgrades a Magic item to a Rare item, adding 1 modifierRight click this item then left click a magic item to apply it. Current modifiers are retained and a new one is added.
, while guaranteeing a specific modifier.