The Candelabra

The Candelabra is a boss that will spawn in the Dungeon randomly after Plantera has been defeated.

Spawning
After defeating Plantera, the Candelabra can spawn in the dungeon. It has a 1 in 7 chance of doing so on any given night between 12:00 and 4:30am. After it has been defeated, killing 500 Dungeon enemies will cause it to be able to spawn again.

Info / Attacks
The left and right heads each have 11250 health, while the middle has 22500. The Candelabra is a boss that can fly through blocks and will not despawn when the player goes too far away, rather will teleport. It follows the Candelabra AI. The music that plays during the battle is the "Atlas" track. Its attacks include:
 * It will attempt to hit the player with its body. Coming into contact will inflict the On Fire! debuff.
 * It will shoot fiery blue projectiles resembling candle flames at the player. Once the projectiles are no longer traveling through walls and are in open space, they will bounce off walls and only disappear once they come into contact with a player or enemy.
 * It will summon Cursed Skull-like projectiles that hover for a moment by the body and then shoot incredibly fast toward players, making them very hard to dodge.
 * Once The Candelabra drops below half health, the chains connecting the three candles will break and the candles will float around by themselves while summoning the aforementioned attacks individually. When all three candles are connected, the boss is called the Candelabra. When they are individual their names are Burny, Flamos, and Waxwell (a play on Bernie, Amos, and Maxwell) respectively.

DROPS

 * 1) Water Candle (6-8, 100%)
 * 2) Blazing Zephyr (1, 100%)
 * 3) The Candelabra Trophy (1, 10%)
 * 4) Candelabra Treasure Bag (expert mode only, 100%)

Sprite Credit
https://forums.terraria.org/index.php?threads/derpos-magnificent-sprites.9091/page-97