Queen Slime

The Queen Slime is an early-Hardmode Hallow-themed boss, and is the Hardmode counterpart to King Slime. Its appearance is that of a massive violet slime wearing a tiara with what seems to be an enlarged, more crystalized 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.

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
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, chosen at random:


 * 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.

Tips

 * The 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.

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.