[Review] Skill Academy: Analysis of the Energy Mastery Skill in Infinity Kingdom

💠Introduction

What’s up, folks? With so many new legendary skills already out and more on the horizon, it can become difficult to know which skills to prioritize with limited funds. In this article, we’ll take a look at Energy Mastery, what it does, its role in the meta, and whether it's worth purchasing.

💠Table of Contents

• Energy Mastery
• Strengths and Synergies
• Verdict
• Summary

💠Energy Mastery

Energy Mastery is a Legendary passive skill that triggers after the user casts an Energy ultimate. It can only be equipped on ranged and mage immortals. It instantly restores up to 400 Energy and grants a 9-second buff that increases Energy-skill damage by 100% at max level. The effect does not stack. The skill cannot be equipped alongside Psionic Tide. The immediate Energy refund accelerates the next ultimate cycle, enabling near back-to-back casts for sustained pressure. This makes it excellent for burst or rapid-cycle lineups that can capitalize on the 9-second damage window to secure kills.

💠Strengths and Synergies

Let’s start with the headline: Energy Mastery’s 9-second, 100% ultimate-damage buff. It’s the only Legendary skill that directly increases ultimate damage, and the impact is obvious in short to mid fights. In 35–45s battles with Loki, equipped with Fighting Master to ensure he doesn’t get affected by crowd control, he dealt averaged about 33 million damage across 13 casts in about 45 seconds, while Energy Mastery pushed that to about 55 million across about 14 casts in approximately 35 second, nearly two times the total output and just as many ultimate casts in shorter time.

Energy Mastery instantly restores 400 Energy after each ultimate, which shortens the time to the next cast. In testing, Loki’s second ultimate occurred roughly 11 seconds after the first without Energy Mastery, but only about 7 seconds later with it—around a 30 percent faster cycle. That earlier refill compounds over the course of a fight, enabling more ultimates per minute and making it easier to chain casts during the nine-second damage window.

The best skills to pair with Energy Mastery are those that accelerate ultimate rotations so you can exploit its nine-second, one-hundred-percent ultimate damage window. Infinite Firepower is a standout partner: its frequent triggers boost Energy Regeneration, which compounds with Energy Mastery’s instant four-hundred Energy refund to produce faster, back-to-back ultimates. Corrosive Power also fits perfectly, adding more Energy Regeneration and an ultimate damage boost after three ultimate hits, further amplifying both burst and sustained damage. For physical damage dealers, Battle Frenzy benefits from the same rapid-cast cadence, since its value rises with every ultimate used. Together, these skills turn Energy Mastery into the core of a high-tempo composition built around relentless ultimate casting.

💠Verdict

Energy Mastery does two things that win fights: it doubles your ultimate damage for nine seconds and instantly refills Energy to speed up the next cast. That combination turns any backline carry into a burst-and-cycle monster, elevating both magical and physical lineups. Its effects compound over an entire battle. Energy Mastery is a foundational slot for your primary damage dealer. Strong Buy rating for its universal fit, explosive power spikes, and unmatched contribution to ultimate uptime.

💠Summary

Energy Mastery is a premier ultimate-focused skill that remains a staple across backline carries. The current meta rewards burst windows and rapid ultimate rotations, and this skill delivers both with its instant Energy restoration and nine-second damage boost. Counters exist, but for any serious lineup built around frequent ultimates—magical or physical—Energy Mastery is close to mandatory. Spend your Divine Coins here with confidence.

What other skill or skill effect would you like to see? Let me know in the comments below!

💠Related Links

Version 2.8.8

Infinity Kingdom Official Website

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