The Hive Mind

"A hive of clustered microbial-infected flesh."

The Hive Mind is a Pre-Hardmode boss fought in The Corruption, with an immobile first phase and a floating, teleporting second phase.

It is the Corruption counterpart to The Perforators.

Spawn
The Hive Mind does not spawn on its own, and requires the player to summon it using a Teratoma or by killing a Hive Cyst in The Corruption.

Behavior
The Hive Mind is stationary in all of Phase 1, summoning Corruption-themed enemies at intervals based on its life. In Phase 2, it starts drifting slowly towards the player while performing various attacks.

The Hive Mind enrages outside The Corruption and on the Surface, each condition reduces the burrow time by one second in Phase 1. In Phase 2, speed is increased and attack transition time is decreased.

Phase 1

 * Remains stationary where it was spawned and immediately summons  by its side.
 * Hive Blobs stick around the hive and fire every six seconds as long as they are farther than five tiles away from the player.
 * Burrows into the ground and reemerges near the player every seconds, to prevent them from straying too far away.
 * Has a 1/150 and 1/60 chance to spawn and  respectively when it takes damage.
 * Summons  or  upon reaching 75%, 50%, and 25% health.
 * Dank Creepers slowly accelerate towards the player.
 * There may only be up to Dank Creepers summoned at once.

Phase 2

 * Hive Blobs are no longer spawned and all existing Hive Blobs despawn.
 * Slowly drifts towards the player for seconds.
 * Lets out a [[Media:EoC Expert Roar.wav|higher-pitched roar]] then dashes directly at the player while fading out and spawns a, , and.
 * These enemies will not be spawned again until they are killed.
 * After fully fading out, the hive teleports away from the player and repeats its attack.

In Expert Mode

 * During Phase 1, The Hive Mind rapidly gains defense while any Dank Creepers are alive, rendering it functionally invincible. Its defense immediately returns to normal when all Dank Creepers are killed.
 * Its defense rises at a rate of 25 per frame, or 1500 per second.
 * When a Dank Creeper is killed, it spawns a which lasts six seconds and rains shade every 0.75 seconds.
 * In Phase 2, drifts for less time and moves faster the lower its health.
 * After every two drift-dashes, the next teleport will be closer to the player. The hive will fully fade in while circling the player, lunge at them when at full opacity, then slows down and drifts towards the player.

In Revengeance Mode

 * Drift-dashes no longer spawn enemies.
 * Spin-lunges occur after every drift-dash.
 * Gains a new attack below 66% health. The hive appears below the player, flies in a semi-circle while spawning a, , , and , then slows down and drifts towards the player.
 * Dark Hearts rain shade onto the player every 0.5 seconds when above them.
 * This attack occurs between each spin-lunge attack.
 * These enemies will not be spawned again until they are killed.
 * Gains another new attack below 33% health. The hive appears above the player, dashes horizontally while spawning 10, then slows down and drifts towards the player.
 * This attack is randomly arranged with the spin-lunge and semicircle-dash attacks, and is never performed twice in a row.

In Death Mode

 * Moves very quickly and teleports extremely often in Phase 2.
 * Can use all attacks upon reaching 66% health.

Aftermath

 * Upon defeating The Hive Mind, the status message "The ground is glittering with cyan light" displays, indicating that Aerialite Ore generated in the world.
 * Sky Crates will contain Aerialite Bars.
 * The Dryad will begin selling Teratomas.
 * The Dryad will also begin selling the Bloody Worm Tooth in Expert Mode.

Tips

 * Leaving The Corruption will enrage The Hive Mind, making it more deadly.
 * Keep this in mind if building an arena; building too far off the ground may take you out of the biome.
 * Be wary of the Hive Mind's summons, making sure to clear them out every so-often, as they can easily overwhelm the player if left unattended.
 * During phase 1, The Hive Mind will summon a swarm of minions at 75%, 50% and 25% health. Keep this in mind while dealing heavy damage, as fighting off more than 1 swarm at a time can be overwhelming.
 * Phase 2 can be extremely chaotic, so clearing out all minions before starting the phase can be greatly helpful.
 * The Hive Blobs will instantly despawn upon entering phase 2, so it's best to focus on the other remaining minions.
 * The Dark Hearts' projectiles can cause a lot of damage if the player is not concentrated on dodging them.
 * During Hardmode, The Hive Mind can be fought to get a large amount of Cursed Flames. This is a highly effective way to get Cursed Flames in a Crimson world, as The Hive Mind can be fought on a Corruption island.

Trivia

 * The Hive Mind's theme is The Filthy Mind, which was composed by the artists DM DOKURO and SixteenInMono.
 * If the Calamity Music add-on mod is disabled, Boss 2 will play instead.
 * The Hive Mind could be considered the Corruption's version of the Brain of Cthulhu, while The Perforators could be considered the Crimson's version of the Eater of Worlds.