The Crown of the Inward Eye is a unique Prophet Crown helmet in Path of Exile known for its powerful and unusual mechanics that convert increases in defensive stats into offensive damage bonuses. It requires level 63, 85 Strength, and 62 Intelligence to equip, making it suitable for hybrid builds that invest heavily in both life and energy shield PoE 1 Currency.

Base Stats and Defensive Boosts
The helmet provides substantial defensive stats:
1. 333% increased Armour and Energy Shield
2. (9–21)% increased maximum Life, Mana, and Global Energy Shield
3. Base Armour ranges roughly from 969 to 1117
4. Base Energy Shield ranges roughly from 138 to 160
These high defensive values make it a strong choice for survivability, especially for builds that balance life, mana, and energy shield pools.

Unique Mechanics: Transfigurations
The defining feature of Crown of the Inward Eye lies in its three "Transfiguration" modifiers, which convert increases (and reductions) to maximum Life, Mana, and Energy Shield into damage bonuses at 30% of their value:
1. Transfiguration of Soul: Increases and reductions to maximum Energy Shield also apply to Spell Damage at 30% of their value.
2. Transfiguration of Body: Increases and reductions to maximum Life also apply to Attack Damage at 30% of their value.
3. Transfiguration of Mind: Increases and reductions to maximum Mana also apply to Damage at 30% of their value.

This means that any gear, passive skills, or buffs that increase your maximum life, mana, or energy shield will also boost your damage output, making this helmet highly synergistic with hybrid defensive builds that stack these stats.

How the Mechanics Work
All increases count, including those from gear and the passive skill tree, but only global increases to life, mana, and energy shield apply—not local increases restricted to a single item. For example, a "+20% increased global energy shield" mod on gear will benefit the helmet’s damage conversion, but a local energy shield increase on the helmet itself will not.

Acquisition and Restrictions
The Crown of the Inward Eye is a drop-restricted unique, primarily obtained from the boss Sirus, Awakener of Worlds, making it somewhat rare and valuable. It cannot be chanced or crafted and is often sought after for high-level builds that want to leverage its unique mechanics.

Usage and Build Synergy
This helmet is considered underrated and versatile, offering both offensive and defensive benefits. It is especially effective in builds that invest in hybrid pools of life, mana, and energy shield, such as certain spellcasters or attack-based characters who benefit from the helmet’s damage conversions. It also serves as a strong enchantment base for the Eternal Labyrinth due to its unique properties PoE Currency.