Queen Slime

Queen Slime is an early-Hardmode Hallow-themed Boss and is the Hardmode counterpart to King Slime. Her appearance is that of a massive violet slime wearing a tiara with what resembles an enlarged, more crystallized version of the Gelatin Crystal, which is the item used to summon her, inside herself.

Fighting Queen Slime is completely optional and not required for game progression, but her defeat may reward the player with useful items.

Her Bestiary entry states: "Hallowed slimes consolidated into a haughty, crushing force adorned in dazzling crystals. She is rumored to grow wings."

Spawning
The Queen Slime can be spawned by using a Gelatin Crystal. This can only be done in the Hallow. Otherwise, nothing will happen and the item will not be consumed.

The Gelatin Crystal can be found in the Underground Hallow alongside Crystal Shards, and they spawn in the same way as Crystal Shards. Therefore, the Gelatin Crystal needs to be mined before use. Once used, the item is consumed, and the boss is summoned.

Behavior
Queen Slime jumps around in a similar fashion to King Slime, though much faster. She periodically summons Crystal Slimes, Heavenly Slimes or Bouncy Slimes. Crystal slimes will shoot several crystals upwards, heavenly slimes will fly towards the player and bouncy slimes will fire bouncing shots towards the player. After a few jumps, she does one of two things, chosen at random:


 * Will stay in one place for a few seconds, before jumping very quickly towards the player, dealing high damage.
 * Will stay in one place for a few seconds, before firing 6 crystal projectiles that break upon impact with a tile. Sometimes, she will perform this attack multiple times in a row.

When at 50% health, Queen Slime will grow wings and begin to fly like a Slimer. Her AI also changes:
 * Instead of firing crystals from herself in 6 directions, she will periodically launch these projectiles towards the player.
 * She will occasionally fire bouncing crystal balls in 8 directions.
 * She will occasionally attempt to fly above and drop down onto the player.

Before she grows wings, Queen Slime is also capable of teleporting to you if she can't reach you, like King Slime. Upon reaching 1/3 health, she will begin to fly away and drop slimes on the player.

Tips

 * Queen Slime herself has a relatively simple attack pattern with easy-to-dodge attacks. The biggest threat comes from the minions she spawns, which can fill the screen with projectiles and quickly overwhelm the player. Killing or avoiding these should be top priority.
 * While the boss needs to be summoned in The Hallow, the fight can take place anywhere. This means you can go into a different biome once the fight starts and the fight will continue as normal.
 * In Master mode a "The Black Spot" mount allows you to hover over all attacks in phase one. It also goes faster than Queen Slime in phase two. So you can fly the length of your world with no chance of getting hit and, as stated above, this will not despawn the boss.

Trivia

 * Queen Slime’s AI was created entirely by developer Grox the Great, while the visual effect was created by Yoraiz0r.
 * The Queen Slime is one of 5 bosses with exclusive music, the others being the Empress of Light, Plantera, Duke Fishron, and Moon Lord.
 * The feather-covered in slime on her trophy resembles the sword covered in slime on the King Slime's trophy.
 * Queen Slime was one of the two bosses added in the first version of the final major update, 1.4.0.1, along with the Empress of Light.
 * Most of Queen Slime's drops are upgraded versions of King Slime's drops.