Energy shield protects mana instead of life. All modifiers to energy shield apply normally but it is not affected by modifiers to mana or mana regeneration. Energy shield recharge and recovery through Zealot's Oath or Ghost Reaver function normally. Any reductions to mana (e.g. skill costs) will instead reduce energy shield by the same amount, and any reduction to energy shield will interrupt its recharging and reset its recharge delay.
Eldritch Battery also causes energy shields to no longer grant a chance to avoid stun.
Eldritch Battery is a standalone keystone located on the upper right edge of the skill tree.
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