Queen Slime

The Queen Slime is an Early-Hardmode Hallow-themed boss. Its appearance is that of a massive pinkish-violet slime wearing a tiara with what seems to be an enlarged, more crystalized version of a Gelatin Crystal inside it.

Spawning
The Queen Slime can be spawned by using a Gelatin Crystal. This can be done in The Hallow at any time.

Gelatin Crystal can be found in the Underground Hallow mixed with Crystal Shards.

The Gelatin Crystals appear to change colors from pink to blue in a slow continuous loop.

Behavior
The Queen Slime jumps around in a similar fashion to King Slime, though much faster. It periodically summons Crystal Slimes which shoot crystals as it takes damage. After a few jumps, it does one of two things:


 * Will stay in one place for a few seconds, before jumping very fast towards you, 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 it will perform this attack multiple times in a row.

When at 50% health, the Queen Slime will grow wings and begin to fly like a Slimer. Its AI also changes:
 * Instead of firing crystals from itself in 6 directions, it will periodically launch these projectiles towards you.
 * Occasionally attempts to fly right above you and fall down onto you.

Before it grows wings, Queen Slime is also capable of teleporting to you if it can't reach you, like King Slime. When it gets down to 1/3 health, it will fly away and drop slimes.

Trivia

 * She appears to be the Hardmode counterpart to King Slime.
 * 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 6 bosses with exclusive music, the others being the Empress of Light, Queen Bee, Plantera, Duke Fishron and Moon Lord.
 * Her Bubble Attack, along with her Sparkle Slime Balloon Drop has been confirmed to be "filled with Party Girl Bath Water". This is a reference to the Twitch streamer Belle Delphine who sold her bath water.
 * 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 update, 1.4.0.1, along with the Empress of Light.