Last Z Power Core Guide: How to Use Them Smarter During Hero Initiative

In Last Z: Survival Shooter, Power Cores are one of the most valuable and rarest currencies when it comes to long-term hero growth.

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If you’ve been saving them without a clear plan, or you’re not sure how to make the most of Hero Initiative events, you’re not alone.

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This guide will walk you through how Power Cores actually work, when to use them, and why timing them right during Hero Initiative can lead to massive point gains without blowing through your resources.

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Let’s break it down…

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What Are Power Cores in Last Z: Survival Shooter?

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Power Cores are used to promote orange hero gear beyond level 20, unlocking star levels that boost hero attack, defense, damage dealt, and more.

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These stats stack fast, and they directly impact how well your squad performs in PvP battles, Arena rankings, Alliance Duel, and kill events.

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Here’s why Power Cores matter in Last Z:

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• Stronger Heroes: Power Cores boost hero stats through gear promotions, making your core team more powerful across all formations.

• Smarter Event Progression: Using Power Cores during Hero Initiative and Duel events helps you score big points with fewer resources.

• Long-Term Growth: Balanced Power Core upgrades across all four gear pieces create more consistent progress, not just one overpowered unit.

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While Power Cores are mostly tied to orange gear, the timing and strategy behind how you use them are just as important as having them.

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Collecting them is one thing, while using them right is what sets smart players apart.

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How to Use Power Cores During Hero Initiative in Last Z (Without Wasting Any)

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In Last Z: Survival Shooter, Power Cores aren’t something you can just throw around. They’re one of the most valuable upgrade materials in the game, especially during Hero Initiative and gear-focused events.

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Before you can even use a Power Core, there are a couple of requirements:

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• You must have orange gear (purple gear doesn’t qualify).

• That orange gear needs to be enhanced to level 20 before the “Promote” option becomes available.

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Once these conditions are met, Power Cores let you add star levels to your gear, unlocking extra hero attack, defense, and even damage dealt bonuses. These upgrades are permanent and significantly boost your team’s performance in PvP, Arena, and Alliance Duels.

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But here's where smart strategy comes in…

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Instead of dumping all your Power Cores into one item, top players recommend spreading your upgrades. It’s better to promote each gear piece to 0.2 stars first because this way, you get solid stat boosts across the board while using fewer resources per upgrade.

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Here’s how it works:

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• 0.1 star typically costs 100 Power Cores.

• 0.2 star might cost 200.

• But going further quickly jumps to 300 or more, so spreading early promotions gives you more value per Core.

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So, in short: don’t rush to max a single gear item, upgrade all orange equipment to 0.2 stars first, and rotate through gear that requires fewer Cores.

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This way, you maximize both your event points and your long-term hero strength without running out of Power Cores when you need them most.

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Power Core Event Strategy: When to Use vs When to Wait

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If you’ve been sitting on a stack of Power Cores, timing your upgrades around events can be the difference between average rewards… and massive gains.

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In Last Z: Survival Shooter, Hero Initiative and Alliance Duel (Gear Day) are the two best times to spend Power Cores. Why? Because these events often include point multipliers, bonuses that reward you more for the same upgrades.

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Let’s say you normally earn 300 points from using 300 Power Cores.

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During Hero Initiative, with the +50% or +100% event buffs active, you’re suddenly getting 450 to 600 points for doing exactly the same thing.

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That’s a huge advantage if you’re trying to hit milestone rewards, rank higher on the leaderboard, or stretch limited Power Cores across multiple gear sets.

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Here’s a smart flow to follow:

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1. Wait for Hero Initiative or Gear Day (Day 4 of Alliance Duel).

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2. Activate event buffs that increase Power Core point earnings.

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3. Promote all eligible orange gear to 0.2 stars (avoid 300+ Core upgrades too early).

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4. Only spend what’s needed to reach rewards or rankings.

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5. Save the rest for the next event cycle.

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This strategy isn’t just about efficiency, it’s how top players stay ahead without overspending.

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And If You’re Spending or Thinking About It…

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Let’s be real: upgrading gear and promoting heroes in Last Z isn’t cheap. Whether you’re already buying bundles or just thinking about topping up, it pays to be smart about where and how you do it.

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Some players wait for in-game discounts or event bundles. Others look for more flexible top-up services that offer the same gear upgrade materials, just at better value (without breaking the rules).

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No matter your approach, the goal is the same: get more progress for every dollar you spend.

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So before your next big upgrade, take a step back and ask: Is there a smarter way to stretch my budget? Your heroes (and your wallet) will thank you.

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Now…

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