Ready to take on Carvex, the tentacle-waving plant monster lurking in Fury Green’s Garden of Remembrance? This is Metroid Prime 4 Beyond’s second major boss fight, and it’s definitely a step up from your encounter with Aberax. The good news? Once you understand the mechanics, Carvex isn’t too difficult to take down — it’s all about mastering that Control Beam you just picked up.
This guide will walk you through every phase of the Carvex boss fight, explain exactly how to expose its vulnerable core, and give you the strategies you need to claim your Psychic Bomb reward.
For more boss encounters and area guides, check out our Sanctum of the Guardians walkthrough and our complete Metroid Prime 4 Beyond gameplay guide.
Where to Find Carvex in Metroid Prime 4
You’ll encounter Carvex in the Garden of Remembrance area within Fury Green. This is a mandatory story boss that you can’t skip, so make sure you’re stocked up on missiles and energy before heading through that ominous boss door.
Pro tip: Make sure you scan Carvex during the fight! If you forget, don’t panic — you can always return to the Sanctum of the Guardians later to scan a hologram version for your data log.
The Key to Beating Carvex: Control Beam Mastery
The entire Carvex fight revolves around one core mechanic: you need to destroy all of its tentacles simultaneously to expose the boss’s vulnerable core. Since tentacles respawn just a second or two after being destroyed individually, you’ll need a special tool to hit them all at once.
Enter the Control Beam — the ability you acquired just before this fight.
How to Use the Control Beam Against Carvex
Here’s the step-by-step process:
- Switch to Psychic Visor by pressing X
- Charge your attack by holding A or ZR
- Release the button to fire a purple guided beam
- Control the beam’s path using the right analog stick (or motion controls if you prefer)
- Guide the beam through the weak spot in the center of each tentacle
- Avoid hitting obstacles — if your beam crashes into anything solid, it dissipates
When executed correctly, threading your Control Beam through all active tentacle weak spots at once will shatter them simultaneously and expose Carvex’s glowing core for a damage window.
Preparing Tentacles for the Control Beam
Before you can use the Control Beam effectively, there’s an important prep step many players miss:
Clear the Outer Casing First
Each tentacle has a protective outer casing with spikes covering its weak spot. You need to:
- Use Samus’ regular Power Beam to shoot and destroy this outer protection
- Stop firing once the weak spot is exposed
- Don’t over-shoot! Hitting the weak spot too many times will destroy the tentacle prematurely
If you accidentally destroy a tentacle before using the Control Beam on all of them, just wait a moment for it to respawn and try again. It’s annoying but not a run-killer.
Carvex Boss Fight Phases
The Carvex encounter escalates through four distinct phases, each adding complexity to the tentacle puzzle:
Phase 1: Single Tentacle
- Number of tentacles: 1
- Strategy: This is your tutorial phase. Clear the outer casing, expose the weak spot, then use the Control Beam to hit it and expose the core.
- Difficulty: Very straightforward
Phase 2: Double Tentacles
- Number of tentacles: 2
- Strategy: Clear both casings, then guide your Control Beam through both weak spots in a single shot. You’ll need to curve the beam path to hit both targets.
- Difficulty: Moderate — requires better beam control
Phase 3: Triple Tentacles
- Number of tentacles: 3
- Strategy: Clear all three casings, then thread your Control Beam through all three weak spots. The tentacles are positioned to make this challenging but not impossible.
- Difficulty: This is where things get tricky
Phase 4: Triple Tentacles + Vine Wall
- Number of tentacles: 3
- Additional obstacle: Wall of vines
- Strategy: Same as Phase 3, but now you need to navigate your Control Beam through gaps in a vine barrier before hitting the tentacles. This requires precise beam control and possibly multiple attempts to find the right path.
- Difficulty: Hardest phase — patience is key
Dodging Carvex’s Attacks
While you’re busy lining up those perfect Control Beam shots, Carvex isn’t just going to sit there and let you work. Here’s how to avoid damage:
Tentacle Swipes
- Dodge method: Strafe left and right
- Keep moving laterally to avoid the sweeping tentacle attacks
- Don’t stand still!
Spin Attack
- Dodge method: Jump
- Watch for the animation cue when Carvex winds up for a spinning attack
- Time your jump to avoid the horizontal sweep
The attack patterns aren’t too complex, so as long as you’re paying attention and staying mobile, you shouldn’t take too much damage.
Damaging the Core: Missile Strategy
Once you’ve successfully exposed Carvex’s core with the Control Beam, it’s time to unleash everything you’ve got:
Best Damage Option: Missiles
- Missiles deal the most damage to the exposed core
- Unload as many as you can during each damage window
- The core is only vulnerable for a limited time, so don’t hesitate
Restocking Missiles Mid-Fight
Running low on missiles? Carvex provides its own resupply:
- The boss occasionally fires spinning metal orbs into the arena
- Shoot these orbs to make them drop missile refills
- Collect them to replenish your ammunition
Bonus tip: When you charge up the Control Beam, it creates a vacuum effect that automatically pulls in nearby missiles and energy orbs. This makes collection much easier — just charge near the pickups and they’ll fly right to you!
Rewards for Beating Carvex
Defeat Carvex and you’ll earn the Psychic Bomb ability for your Morph Ball. This upgrade is essential for progression and opens up tons of new areas throughout the game, including puzzle rooms back in Fury Green and later areas like the Manufacturing Floor in Volt Forge.
Frequently Asked Questions
Q: What happens if I forget to scan Carvex during the boss fight in Metroid Prime 4?
A: Don’t worry! If you miss scanning Carvex during combat, you can return to the Sanctum of the Guardians area later in the game. After defeating Carvex, a holographic recording of the boss will become available there, allowing you to scan it at your leisure without the pressure of dodging attacks. Check our Sanctum of the Guardians guide for details.
Q: Can I beat Carvex without using the Control Beam?
A: No, the Control Beam is mandatory for this fight. You cannot damage Carvex’s core without first using the Control Beam to simultaneously destroy all active tentacles. This is by design — the boss fight is specifically built around teaching you how to master this new ability. Make sure you’re comfortable with guiding the beam before attempting the later phases.
Q: How many missiles should I have before fighting Carvex in Metroid Prime 4?
A: You should be fine with the default missile capacity you have at this point in the game. Carvex drops missile refills throughout the fight via those spinning metal orbs, so you can restock as needed. That said, starting with a full missile count (and full energy) is always recommended for any boss fight. If you’re running low, explore Fury Green for Missile Expansions using your explosive force before tackling the boss.
Q: Why does my Control Beam keep disappearing when fighting Carvex?
A: Your Control Beam will dissipate if it hits any solid obstacles before reaching the tentacle weak spots. During the later phases, especially Phase 4 with the vine wall, you need to carefully guide the beam through openings and gaps. If your beam keeps disappearing, slow down and trace a more careful path with the right analog stick. You don’t need to rush — take your time lining up the shot properly. Also make sure you’re holding the charge button long enough before releasing.
With these strategies in hand, you should be able to take down Carvex without too much trouble. The Control Beam might feel awkward at first, but once you get the hang of threading it through multiple weak spots, the fight becomes much more manageable. Now get back to Metroid Prime 4 Beyond and claim that Psychic Bomb upgrade!
