Hullbreaker

Hullbreaker
Internal Attributes
Mob ID	alexscaves:hullbreaker
Added in	1.0.0
Stats
Health	400.0
Damage	14.0
Other External Attributes
Spawn	Abyssal Chasm
Behavior	Neutral
Drops	Copper Ingot Sea Glass Shards Enigmatic Engine Immortal Embryo Scrap Metal

Hullbreakers are rare gigantic neutral aquatic mobs found in the Abyssal Chasm. They are formidable predators that attack glowing mobs in addition to submarines that have their floodlights on.

Cave Compendium Entry

"The Hullbreaker is a colossal fish over fifteen blocks long. Being a predator adapted to hunt exclusively in dark waters, it hunts by seeking out any glowing entity. It quickly makes a kill by using its massive teeth to bite prey or its head as a battering ram to smash them. The easiest way to avoid the wandering eyes of a Hullbreaker is to stop emitting light, and to remove any glowing effect or entity. Hullbreakers always investigate possible prey items before attacking, circling them multiple times whilst its many body lights begin to flash rapidly. In the almost unheard of chance that one is defeated in combat, it will spew out what it has eaten before dying. This includes common items like ink sacs, but can also be remains of Submarines such as the Enigmatic Engine. If a hullbreaker is detected whilst one is in a submarine, caution must be taken to immediately turn off any and all floodlights until the beast passes..."

- Dr. Prof. Alexander Caverns, PhD.

Spawning

Hullbreakers can spawn anywhere in the Abyssal Chasm.

Drops

On death

Item	Roll Chance	Quantity
Enigmatic Engine	100%	1
Immortal Embryo	100%	1
Sea Glass Shards	100%	2-5
Copper Ingot	100%	2-8
Scrap Metal	100%	2-4

Contrary to their Cave Compendium entry, Hullbreakers do not drop Ink Sacs.

Behavior

Hullbreakers will target any mobs that emit a bright glow from their bodies, in addition to any mobs that are affected by Glowing and any players inside submarines that have their floodlights on.

Hullbreakers keep track of their interest in targets as a number from 0 to 6. When a Hullbreaker notices a target, it will immediately add 5 interest, causing its eyes and photophores to start pulsing - if within 17 blocks of its target, it will also stare at them while slowly tilting its head from side to side for 3 seconds. In addition to this, any submarines that catches the interest of a Hullbreaker will start emitting sonar pings while causing their control panel to pulse. After noticing its target, a Hullbreaker will then enter an inspection phase where it circles around its target for a minimum of 6 seconds before staring at them again, repeating the phase. Should it be able to progress through an equivalent of 2 inspection phases, it will add 1 interest - once it reaches 6 interest, it will start attacking its target directly. If a player or another mob attacks a Hullbreaker's torso, it will immediately add 6 interest and start attacking them - being a multi-part mob, a Hullbreaker will not start attacking if hit anywhere else. If its target escapes, it will immediately lose all its interest.

Below is a list of mobs that Hullbreakers will target on sight, regardless of whether they are affected by Glowing or not.

Mob	Swims?	Spawns in Abyssal Chasm?	Notes
Glow Squid	Yes	Yes
Blaze	No	No	Blazes take damage in water, and thus often die before the Hullbreaker can attack.
Enderman	No	No	Endermen automatically take damage and teleport on contact with water, and thus rarely ever get targeted by a Hullbreaker.
Allay	No	No	Allays will avoid water at all costs, and thus rarely ever get targeted by a Hullbreaker.
Magma Cube	No	No
Phantom	No	No	Unlike most other flying mobs, Phantoms will fly into water, allowing them to be easily targeted by a Hullbreaker.
Warden	No	No
Teletor	No	No
Magnetron	No	No	Magnetrons will bounce up and down on the water's surface, constantly resetting the Hullbreaker's interest and thus rarely ever getting attacked by it.
Boundroid	No	No	Boundroids' winches will bounce up and down on the water's surface, but they themselves will float in place, allowing them to be easily targeted by a Hullbreaker.
Notor	No	No
Nucleeper	No	No
Radgill	Yes	No
Raycat	No	No
Gossamer Worm	Yes	Yes
Tremorzilla	Yes	Depends	A Tremorzilla can spawn in the Abyssal Chasm if its egg is hatched there.

When within 8 blocks of its target, a Hullbreaker will usually bite at them. Occasionally, however, it may lower its head to tackle them, breaking any blocks with a blast resistance of 15 or less in the way. Hullbreakers are incapable of breaking barriers, bedrock, command blocks, End portal blocks, End gateway blocks, jigsaw blocks, lights, moving pistons, reinforced deepslate, structure blocks, and Volcanic Cores. If /gamerule mobGriefing is false, a Hullbreaker will be unable to break any kind of block with its tackle.

Upon death, a Hullbreaker will wail while expelling its drops from its mouth - if on land, it will groan as it expels its drops instead. Items expelled from the Hullbreaker's mouth have a glowing white outline, similarly to mobs affected with Glowing.

Since they are classified as creatures rather than monsters, Hullbreakers will persist on Peaceful difficulty. However, they will never attack players, only inspecting them if they are inside submarines that have their floodlights on.

Resistances and weaknesses

Hullbreakers take 35% less damage from projectiles that hit its torso and 65% less damage from those that hit anywhere else.

As inhabitants of the Abyssal Chasm, Hullbreakers do not sink in muck. Due to their immense size, they also cannot be possessed by the Totem of Possession.

Hullbreakers cannot survive outside of water. If outside of water, they will lay on their sides and start emitting guttural growls, taking 2 suffocation damage every second after 15 seconds.

Trivia

• Hullbreakers are classified as underground water creatures, similarly to Glow Squids.
• Hullbreakers will not make sound when attacking targets unless they successfully hit them.

History

1.0.0	Introduced.
1.1.0	Now takes less damage from projectiles. Now drops an Immortal Embryo upon death.

Gallery

• 

  A Hullbreaker swimming with some Glow Squids.

• 

  A Hullbreaker vomiting the contents of its stomach on death.

• 

  A Hullbreaker attacking Deep Ones.

• 

  A Hullbreaker investigating a Submarine.