Mindspiral is a unique Aventail helmet in Path of Exile that is highly valued for builds focusing on mana and energy shield synergy, especially those utilizing the Mind over Matter (MoM) mechanic. It offers a blend of defensive and utility stats that make it a staple for mana-based tanky characters.

Key Stats and Effects
1. +(100-120) to Maximum Mana: This large boost to maximum mana is vital for mana-heavy builds, increasing both mana pool and scaling for mana-based defenses.
2. Gain (10-15)% of Maximum Mana as Extra Maximum Energy Shield: This converts a portion of your mana pool into additional energy shield, effectively increasing your total defenses. This synergy is especially powerful for MoM builds, where mana acts as a buffer before life is affected.
3. Enemies Cannot Leech Mana From You: This prevents enemies from draining your mana, which is crucial for maintaining mana sustain and the effectiveness of mana-based defenses.
4. (10-20)% of Damage Taken Recouped as Mana: This unique leech mechanic helps regenerate mana when taking damage, improving survivability and sustaining skills or defenses that rely on mana.

Usage and Build Synergy
Mindspiral is most commonly used in MoM builds, where a significant portion of incoming damage is taken from mana before life. The helmet’s ability to convert mana into energy shield and prevent mana leech makes it ideal for sustaining large mana pools and energy shield buffers. The damage taken recouped as mana effect further enhances mana sustain, allowing for more aggressive playstyles or tankier setups.

Because of its mana and energy shield synergy, Mindspiral fits well on classes and ascendancies that can boost mana, energy shield, or both—such as the Hierophant, Occultist, or Trickster. It is often paired with other mana-boosting gear and passive tree nodes to maximize its benefits.

Acquisition and Crafting
Mindspiral can drop anywhere in the game and can also be obtained by "chancing" a normal Aventail helmet. It has several crafting recipes and legacy variants, but the current version remains popular for its unique stats. Players can also craft or trade for it on the market.

Summary
Mindspiral is a versatile and powerful helmet for mana-focused builds in Path of Exile, particularly those using Mind over Matter. Its combination of maximum mana increase, mana-to-energy shield conversion, mana leech immunity, and mana leech on damage taken makes it a cornerstone item for sustaining large mana pools and enhancing survivability. This unique helmet remains a popular choice for players seeking to build tanky, mana-based characters.
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