流亡2編年史, Path of Exile Wiki

# Rarity

## Item rarity tier system
Modifiers and stats that influence the rarity of dropped items function using a skewed "10-tier" rarity system. When an item drops, one of these tiers is selected; the item rarity stat increases the chances to select a higher tier.

How the 10-tier system works is as follows:

Rarity tier 1-5:

* Increases the chance for an item that can have rarity to drop as magic, rare, or unique.
  * This conversely reduces the chance for dropped items to be converted to gold[2]
* Increases the chance to upgrade currency to higher value currency
* Increases the chance to not drop base types that are significantly lower level requirement than the area's drop level
* Does not affect the outcomes of modifiers on unidentified items

Rarity tier 6-10 / Unidentified (Tier 2-6):

* Implements the unidentified modifier tier system (e.g. Unidentifed (Tier 5)).
  * When identified, each Unid tier incrementally removes low-value modifiers from the modifier pool. Although modifier tiers increase a modifier's value, not all modifier families are valued equally; for example, light radius modifiers are completely removed at higher Unid tiers.
  * This does not affect the outcome of modifiers added after the item is identified, such as through crafting.

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