Emperex does not use mana as a resource, but instead uses Essence as the primary resource and cost for all of his abilities except for Essence Transfer, which has no cost. Essence cannot be regenerated but Emperex can restore 50 - 100 (based on level) Essence everytime he transfers the Void Essence and every time he damages an enemy champion by ways other than dealing damage by transferring the Void Essence to them (12 second cooldown). Additionally, Emperex restores 1% of his missing Essence every time he auto-attacks an enemy champion. Upon returning to the fountain, Essence is instantly restored to 100%. Emperex starts with 150 Essence at level 1 and gains 50 every time he levels up. Maximum Essence values from levels 1-18: 150 - 1000 (based on level).
The Void Essence is the center of Emperex' kit and serves as the casting point for all of his abilites. It can be transferred between units, both allied and enemy (including himself), by using Essence Transfer, his ultimate ability, which is available at level 1. The Void Essence grants special effects to the target it is attached to:
- Ally: Target gains 5 - 35 (based on level) movement speed.
- Enemy: Target loses 1 / 2 / 4 / 6 / 8% maximum health.
- Emperex: Emperex gains 5 / 10 / 15% bonus armor and magic resistance.
The Void Essence returns back to Emperex if the target other than Emperex himself leaves his sight radius (1200 range). Additionally, casting a spell puts on a global cooldown of 2 seconds, and reduces the cooldown of Essence Transfer by 2 seconds if it is on cooldown.