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Call of Duty Black Ops 7 (BO7)

Astra Malorum Boss: How to Beat Caltheris

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☠︎︎ Astra Malorum Easter Egg Walkthrough
☠︎︎ Astra Malorum Wall Buys
☠︎︎ Best Zombies Weapons Tier List
☠︎︎ How to Level Up Fast

How to beat Caltheris

Caltheris is the Astra Malorum boss in Call of Duty Black Ops 7 (Bo7) Zombies. Learn how to beat Caltheris including the tips that will help you survive its 4 phases!

List of Contents

What to Prepare for Caltheris Boss Fight

What to Bring What to Avoid Bringing
✓ LGM-1 Wonder-Weapon
✓ Frenzied Guard
✓ Stim Shots
✓ LT53 Kazimirs
✓ Decoys
✓ Cymbal Monkeys
✓ Self Revive
GobbleGums:
✓ Shields Up
✓ Cache Back
✓ Power Keg
✓ After Taste 		✕ Aether Shroud
✕ Disciple Injection
✕ ARC-XD
✕ D.A.W.G.

Fully Upgrade LGM-1 Wonder Weapon

The Astra Malorum Wonder Weapon LGM-1 is the weapon that deals the most damage against Caltheris. It's also a weapon thato auto-locks onto a single target, making it very useful against this boss.

Fully upgrade the LGM-1 Wonder Weapon to Pack-a-Punch 3 to deal the most damage against Caltheris. This wonder weapon can be obtained by doing the Astra Malorum Main Easter Egg.

Use Frenzied Guard

Recommended Augments
Frenzy FireFrenzy Fire RallyRally ExtensionExtension

If you equip the Frenzy Fire augment and activate Frenzied Guard, you'll be able to fire the LGM-1 continuously without reloading for the whole duration of Frenzied Guard. This results in devastating damage that can melt Caltheris' health bar in seconds.

Take note that this strategy might get patched as it seems to be overpowered. Alternatively, you can also use Frenzied Guard as a utility by equipping the Rally augment to repair your allies' armor.

Best Augments

Craft and Equip Stim Shots

Before starting the boss fight, make sure to craft and equip stim shots first. This equipment elevates your chances of survival as it can negate the burst type damage that Caltheris outputs.

Equip Equivalent Exchange Augment

Equivalent ExchangeEquivalent Exchange

Equivalent Exchange is a Quick Revive augment that lets you revive yourself if you deal enough damage while in the death circle. If you're successful in reviving yourself, you'll be able to keep all of your perks. This is especially important due to the length of the boss fight.

Take note that you'll need to upgrade your sidearm with Pack-a-punch if you want to deal enough damage to use this augment. Alternatively, having a ray gun makes this much easier as this is the weapon that you'll use if you get knocked down.

Warning: Ray Gun Should Not be 3rd Weapon (Mule Kick Users)

Note that if you have Mule Kick active (which grants you a 3rd primary weapon slot), your Ray Gun / Ray Gun Mark 2 (or whichever strong pistol you have) should not be in your third weapon slot, as it will be dropped when you're down. This will limit you to a unupgraded pistol when downed, which won't be enough to trigger Equivalent Exchange.

To avoid this, swap weapons around your slots buy purchasing from a Wall Buy and picking up the weapon that dropped.

Avoid Using Aether Shroud

While Aether Shroud is a good field upgrade, we recommend not using it for this boss fight. As of the time of writing, Aether Shroud cannot be used at the start of the boss fight's second phase, making it useless.

How to Beat Caltheris

Caltheris Boss Tips
Check Icon1st Phase: Kill Zombies to Fill the Soul Box
Check IconAvoid its Laser Beams
Check IconAvoid the Poison by Heading to the Top
Check IconUse the Environment to Avoid Rock Throws
Check IconJump to Avoid Slam Attacks
Check IconKill Robed Zombies to Obtain Armor Plates
Check IconCommunicate with your Squad

1st Phase: Kill Zombies to Fill the Soul Box

Interact with the altar

At the start of the fight, Caltheris is completely invulnerable to your guns. The only way to deal damage is to charge up the soul box by killing zombies, then interact with the brain on the top platform to trigger a firing sequence. Your screen will flash to indicate that the soul box is charged and is ready to be used.

You'll need to do this sequence thrice before advancing to Caltheris' 2nd phase.

Continue Moving to Avoid its Laser Beams

One of Caltheris' attacks is a homing laser beam that will follow and track your current position. To avoid this attack, you must keep moving away from it until it disappears.

Avoid the Poison by Heading to the Top

Caltheris spews out poison that will temporarily decrease your max health and blurs your vision. If you want to avoid this attack, you can head up to the altar as the poison cannot reach this area.

Consider Enduring the Poison if You're With a Squad

While the poison's effect can be troublesome, a problem can arise from avoiding it. If you're playing with a group, the safe area up top can be crammed within seconds if the entire squad decides to avoid the poison. Consider assigning some members to endure the poison while the others avoid it.

Use the Environment to Avoid Rock Throws

One of Caltheris' most damaging attack is his rock throw. This attack can one shot players who sit at 150 health with no armor plates. To completely avoid this attack, be mindful of Caltheris' actions and find cover whenever he poises to throw a rock. Alternatively, you can dodge it by jumping to the side albeit being more risky.

Jump to Avoid Slam Attacks

Another attack that deals heavy damage and blurs your vision is Caltheris' slam attack. This can be dodged by jumping in the air to avoid the shockwaves that its slam creates. Try not to jump too early whenever Caltheris telegraphs his slam to avoid taking damage.

Also note that the ground slam attacks don't affect the entire arena. If you're on the opposite side of the arena / far enough from Caltheris, you won't need to jump to avoid taking damage from the ground slam.

Kill Robed Zombies to Obtain Armor Plates

Make sure to kill robed and heavy zombies to gain armor plates. Additionally, you can opt to go with the Vulture Aid perk and equip the Armor-Matic augment so that your armor automatically refills with each armor plate that you pick up.

If you're able to, you can also purchase an armor wall buy for 10,000 Essence. This can be found at the top of the stairs near the area's entrance.

Communicate with your Squad

Make sure to call out Caltheris' actions when playing with a squad! With how long the boss fight is, surviving is very important as this allows you to keep your perks. Call out his attack patterns so that your whole squad can dodge!

Black Ops 7 Related Guides

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Zombies Guide and All Content

Zombies Guide

All Zombies Guides
Zombies Maps Wonder Weapons
Best Zombies Weapons Tier List Best Augments
Augments How to Research Augments
GobbleGums Zombies Perks
Zombies Field Upgrades Ammo Mods
Cursed Mode Guides
How to Unlock Cursed Mode How to Unlock Relics
How to Get Golden Armor -
Astra Malorum Guides
Astra Malorum Easter Egg Walkthrough Astra Malorum Interactive Map
All Astra Malorum Wall Buys How to Kill Oscar
How to Get the LGM-1 Can You Respawn Oscar?
Astra Malorum Boss: How to Beat Caltheris -
Ashes of the Damned Guides
Ashes of the Damned Easter Egg Walkthrough Ashes of the Damned Side Quests
Ashes of the Damned Map Ashes of the Damned Wall Buys
All Ashes of the Damned Key Locations Ashes of the Damned Boss: How to Beat Veytharion
Ashes of the Damned Perk Locations Ashes of the Damned Free Powerup Locations
How to Spawn Zursa Bear Ashes of the Damned Codes Solver
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Freezer Key Location Jar of Spores Location
How to Trigger Lightning All Saw Trap Locations
Der Wunderfizz Location -
Other Zombies Guides
HUD Customization -

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