What are Bonded modifiers in Path of Exile 2?

Bonded modifiers are one of the more obscure but powerful endgame mechanics in Path of Exile 2, offering an additional layer of optimization for players who want to push their builds to the limit. These modifiers act as hidden enchantments on Runes and Idols, granting extra stat bonuses without interfering with the item's primary function. While they aren't mandatory for success, Bonded modifiers provide meaningful utility and damage scaling that can make a noticeable difference in high-level content.

This guide explains what Bonded modifiers are in Path of Exile 2, how to unlock them, which builds benefit the most, and which Runes and Idols offer the strongest Bonded effects.

What Are Bonded Modifiers in Path of Exile 2?

Bonded modifiers are secondary enchantments that can appear on certain Runes and Idols. These bonuses are applied automatically once unlocked and do not replace or weaken the base effect of the Rune or Idol. Instead, they act as free additional stats, making them ideal for min-maxing endgame characters.

Examples of Bonded modifier effects include:

Increased maximum Life or Mana
Increased critical strike chance or damage
Reservation Efficiency for skills
Cooldown Recovery Rate
Utility bonuses tied to shapeshifting or minions

Because these effects do not compete with Path of Exile 2 Currency standard affix slots, they are especially valuable when optimizing high-end Path of Exile 2 Items where every stat point matters.

Class Restriction: Who Can Use Bonded Modifiers?

Bonded modifiers are exclusive to the Druid class, specifically the Shaman Ascendancy. Other classes cannot activate or benefit from cheap POE 2 Currency Bonded modifiers, even if they equip a Rune or Idol that technically has one.