Secrets Of The Shadows/Subspace Serpent

The Subspace Serpent is a Hardmode boss.

Summoning
The Subspace Serpent does not spawn on its own and is summoned by throwing a while in The Underworld.

Behavior
Subspace Serpent is a worm boss that focus more towards bullet hell type with many varying attacks that require precision to dodge. Subspace Serpent has an adaptive DPS cap which prevents it from being melted. The head and the tail don't have the dps cap.

Phase 1
Subspace will loop the attacks based on a specific order on all phases:
 * Circle the player and summon a few colored symbols that explode to laser.There are 3 different variants of these symbols: Green (Cross section laser), Red (Diagonal laser), Purple (Hexagonal laser).
 * Create a green line of telegraph that the serpent will occupy then releases barrages of laser walls repeatedly. Going behind the Serpent will trigger an instakill worm to attack you and also affect you with darkness that rapidly drains your void.
 * Summon massive worm swarm at the player from below and either the left or right side depending on the player spawn point.
 * When reaching 50% hp, Subspace will enter transition phase and summon an Eldritch Eye that summon a maze like circle with a periodically shooting red bolt to block the player's path temporarily. Once this attack is finished Serpent will progress to the 2nd phase.

Phase 2

 * Summon the laser wall attack again but there is a second wall but it is red and fires slow firebolt projectiles
 * Summon vertical walls of 4 telegraphed lasers projectiles which you have to memorize before the darkness makes them invincible.
 * Charge at the player rapidly that rains down fire bolts from serpent's body
 * Circle symbol attack again but the symbols spawn in larger numbers and they can move position which is telegraphed by an arrow.

Tips

 * It is best to throw the outside of the arena as it can destroy blocks.
 * A large and long arena is highly recommended as some attacks require you to run away only.
 * The purple symbol attack will never hit you if you stand still, go beside, above, and beside it.
 * The Eldritch Eye attack should be handled very slowly.
 * The memorization attack is best dodged by counting the gap as in rows.
 * Having less movement accessories may be preferrable as this fight requires extremely high precision.

Trivia

 * Subspace's body can spin around, creating a 3d animation.
 * Subspace Serpent's theme is The Serpent of Sage composed by Heart Plus Up!.