Guide:Obtaining a Terraprisma

The  is an aerial Hardmode post-Plantera summon weapon. It spawns a detached copy of itself that rapidly attacks nearby enemies. It is dropped from the Empress of Light only when all damage dealt to the Empress occurs during the day. At daytime, she is enraged, which causes all of her attacks to instantly kill the player and thus increase the difficulty of the boss itself

Spawning
In order to spawn the Empress of Light, you need to kill a. These creatures only spawn at Night in the Hallow. An easy way to ensure you deal all damage during the day is using a to catch the creature, and then release it during the day.

Differences between Night and Day
The Empress of Light will enrage if still alive or if summoned during the daytime, causing her attacks to do tens of thousands of damage, similar to the Dungeon Guardian, instantly killing players who are hit by her attacks. This enraged state is indicated by her attacks turning from rainbow to bright yellow.

Attacks
Prismatic Bolts – Summons a cloud of prismatic bolts that home in on the player after a short time. These bolts do not have perfect tracking, and will miss if the player makes a sharp turn as they approach. Because she is enraged, extra bolts are created, and they will spread out more before homing onto the player.
 * Dash Attack – Positions herself to the left or right of the player before charging horizontally in the player’s direction.
 * Sun Dance – Hovers above and slightly to the left of the player and emits 8 rays of light that slowly rotate clockwise. 3 sets of rays are created per sun dance, each positioned slightly more clockwise from the last.
 * Everlasting Rainbow – Releases a ring of 13 stars that spiral out clockwise, then spiral back in the same direction. These stars leave behind a trail of light that will damage the player.
 * Ethereal Lance – Summons a swarm of swords that launch in the direction the player was headed when they were summoned, telegraphed by colored beams. These swords are summoned behind where the player was moving, or all around the player if they were stationary. The swords do no damage until launched. Because she is enraged, extra swords are summoned, and they will launch faster.

Attack Pattern
The Empress has set attack patterns for both of her phases.

First phase
When spawned, the Empress will hover in place for a few seconds before executing the following attacks in order:


 * 1) Prismatic Bolts
 * 2) Dash Attack
 * 3) Sun Dance
 * 4) Dash Attack
 * 5) Everlasting Rainbow
 * 6) Prismatic Bolts
 * 7) Dash Attack
 * 8) Ethereal Lance
 * 9) Dash Attack
 * 10) Everlasting Rainbow

This sequence of attacks will repeat indefinitely until the second phase starts.

Second phase
When the Empress is below half of her max health, she will disappear for a second, then reappear above the next estimated location of the player before executing a new set of attacks, with slightly shorter attack intervals than before:


 * 1) Ethereal Lance Ver. 2:  Summons 6 evenly spaced waves of swords that target specific points around the player instead of traveling from one side of the screen to the other. The first wave travels from the left side of the screen to the right of the player, the second wave from the right side to the left of the player, the third wave from top side to the bottom-right of the player, the fourth wave from top side to bottom-left of the player, the fifth wave from the bottom side to top-right of the player, and the sixth wave from the bottom side to top left of the player.
 * 2) Prismatic Bolts
 * 3) Dash Attack
 * 4) * If enraged, she will cast Ethereal Lance after the dash before resuming her normal pattern (targets where the player is rather than where they will be, or do nothing if the player is stationary)
 * 5) Everlasting Rainbow
 * 6) Prismatic Bolts
 * 7) Sun Dance
 * 8) Ethereal Lance
 * 9) Dash Attack
 * 10) Prismatic Bolts (Cast in a circle around the Empress instead of a cloud directly above her)

This sequence of attacks will repeat indefinitely until she is defeated.