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How to Summon the Exo Mechs in Terraria Calamity: A Comprehensive Guide

The Exo Mechs are among the most challenging bosses in the Terraria Calamity Mod, a grueling post-Moon Lord gauntlet that tests even the most seasoned players. Unlike many other bosses, they don’t spawn naturally. You’ll need to take specific steps to bring these mechanical monstrosities into your world. The key is The Codebreaker, which doesn’t spawn on its own. You need to craft The Codebreaker with a Decryption Computer and an Auric Quantum Cooling Cell. Once you’ve constructed it, interact with it (right-click) and press the “Contact” button. This action initiates the summoning sequence, allowing you to battle Ares, Artemis, Thanatos, and Apollo in any biome, at any time.

Understanding the Components of the Exo Mech Summon

Before you can even think about fighting the Exo Mechs, you need to gather the necessary components. This process involves progressing through the Calamity Mod’s endgame content.

Crafting The Codebreaker

The Codebreaker itself is crafted using the Decryption Computer and the Auric Quantum Cooling Cell. These items require their own set of prerequisites to acquire.

Decryption Computer: This is one of the most important ingredients for the whole summoning process.
Auric Quantum Cooling Cell: This item is key to completing The Codebreaker.

Initiating the Summoning Sequence

Once The Codebreaker is assembled, it’s time to summon the Exo Mechs. This is done by interacting with The Codebreaker. Simply right-click on it while it’s in your inventory or placed somewhere accessible. A menu will appear with the “Contact” button. Clicking this button initiates the process that leads to the Exo Mechs appearing. You can fight them in any biome and at any time once you summon them this way.

Preparing for the Exo Mech Battle

The Exo Mechs are not to be taken lightly. Adequate preparation is crucial for survival.

Gear and Equipment

Armor: Opt for the best possible armor available to your class. This usually means post-Moon Lord armor sets tailored to your preferred playstyle.
Weapons: Each class has specific weapons that excel against the Exo Mechs.
Accessories: Focus on accessories that boost damage output, survivability, and mobility.
Potions: Stock up on a wide variety of potions.

Arena Design

A well-designed arena can significantly improve your chances of success. Consider incorporating features such as:

Long Platforms: These allow for greater mobility and dodging.
Campfires and Heart Lanterns: These provide passive health regeneration.
Honey Pools: These further enhance health regeneration.

Choosing the Order of Engagement

Many players find Thanatos to be the easiest of the Exo Mechs to defeat first. Taking down Thanatos first can provide an advantage due to the drops they provide.

Frequently Asked Questions (FAQs) About the Exo Mechs

Here are some common questions players have regarding the Exo Mechs in the Terraria Calamity Mod:

How do I summon the Inventors? The Inventors are summoned by using a Draedon Power Cell on a Wulfrum Signal Transmitter. This will send out transmission waves, causing the Inventors to appear. This fight can be completed earlier than the Exo Mechs and is a great way to get good gear.
How do I summon XP-00 Hypnos? To summon XP-00 Hypnos, right-click the Bloody Vein pet item on The Codebreaker. This summons the real Draedon, who then summons the Hypnos machine. This avoids summoning Ares, Artemis, Thanatos, or Apollo. Defeating Hypnos will grant you access to better items.
What is the best summon weapon against the Exo Mechs? Yharon’s Kindle Staff is one of the strongest options, providing high DPS. Vigilance is also a powerful choice. Perdition is a sentry that deals consistent DPS without needing resummoning. The Neuraze is another powerful option for summoners that is obtained by defeating XP-00 Hypnos.
Is Calamitas a girl? Calamitas is the central antagonist of the Terraria Calamity Mod. She is a powerful magic user and a minion of the Jungle Tyrant, Yharim.
How do I summon all Elementals in Calamity? The Heart of the Elements is a craftable Godseeker Mode accessory that summons all of the Elementals to assist the player and attack enemies.
Why can’t I summon the Exo Mechs? Ensure you have constructed The Codebreaker using a Decryption Computer and an Auric Quantum Cooling Cell. Once constructed, interact with it (right-click) and press the “Contact” button.
What is the easiest Exo Mech to fight first in Calamity? Many players recommend choosing Thanatos first. Defeating it provides an advantage for the subsequent battles.
Can you summon the Moon Lord in Terraria? Yes, the Moon Lord can be summoned with a Celestial Sigil after defeating the Lunatic Cultist in any world where the Golem has been defeated.
Can you summon Cthulhu in Terraria? The Eye of Cthulhu can be summoned manually using a Suspicious Looking Eye at night (beginning at 7:30 PM in-game time).
Who is the final boss in Calamity? Draedon and his Exo Mechs (Ares, Apollo, Artemis, and Thanatos), along with Supreme Calamitas, are considered the final bosses of the Calamity Mod, excluding hidden bosses.
Are the Exo Mechs fought before or after Supreme Calamitas? They are typically fought after The Fabricational Quartet and Supreme Calamitas have been defeated, although it is possible to fight Supreme Calamitas after.
How do I get Ares’ Exoskeleton? Ares’ Exoskeleton is a post-Moon Lord summon weapon that drops from the Exo Mechs after XF-09 Ares has been defeated last.
How do I summon Mecha Medusa? Mechdusa can be summoned manually with Ocram’s Razor anywhere at any time. It also has a 1/20 (5%) chance to spawn naturally at dusk (7:30 PM) once a Demon or Crimson Altar has been destroyed, as long as at least one of its constituent bosses has not yet been defeated in the current world.
How do I summon Leviathan and Anahita? To begin the boss fight, kill any Ocean enemy with a Wakasagihime, or kill a statue of Anahita which spawns randomly in the Ocean. Doing this will spawn just Anahita at first, and The Leviathan herself will only spawn once Anahita reaches 40% health.
Is Yharim the bad guy? Yharim is the main antagonist of the Terraria Calamity Mod. He is a tyrannical figure whose base of operations is mainly located in the Jungle.

Successfully summoning and defeating the Exo Mechs requires a deep understanding of the Calamity Mod’s mechanics, dedicated preparation, and skillful execution. Good luck, and may your battles be victorious!

Remember that gaming can be a powerful tool for learning and skill development. Organizations like the Games Learning Society at https://www.gameslearningsociety.org/ are dedicated to exploring the educational potential of video games and other forms of interactive media. Their work highlights the many ways in which games can be used to foster creativity, problem-solving, and critical thinking.

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