Wombs belong in the Organoid tier.
Spawning
Spawned when a Signal is sent to a Proto Hivemind and she doesn't find any Calamities to Redirect, in which she will spawn a Womb within a 12 block radius of herself.
Unique Behavior
Wombs can eat Infected, Evolved, Hyper Evolved, Bairns, Scampers, and Gastgebers with a 2.5% chance every tick to eat them if they get close enough. Each Mob gives ten Biomass. Depending on the fed Mob's Kill Points will vary the amount of additional Biomass gained (e.g. If a Knight has three Kill Points and is eaten by a Womb, the Womb gains 13 Biomass). Wombs will also passively gain one Biomass every thirty seconds. They can additionally be given Biomass by Scents. Once a Womb amasses 100 Biomass, it will spawn a Calamity.
Depending on where a Parent Signal occurred will change what class of Calamity results from the spawned Womb.
If no specific conditions are met for a Parent Signal, it will result in a Land Calamity.
If a Parent Signal occurred at or below Y=63, it will result in a Ground Calamity.
If a Parent Signal occurred at or below Y=70 and, in a 14x14x14 block area around the Parent Signal, there are 7 or more Water Blocks, it will result in a Water Calamity.
If a Parent Signal occurred at or above Y=90, it will result in an Air Calamity.
There's also a 30% chance that the Womb will spawn the incorrect Calamity type.
Wombs have 3 Ages, each having a different size and stats and depending on how much Biomass it has. After reaching 25% of the needed Biomass but less than 50%, it will increase to Age 2. Once above 50%, it increases to Age 3, which is its max Age. The stat increase of the Womb (HP and armor) is determined by the current stats times the numerical value of the next Age up.
If a Womb is killed in its final growth stage, it will spawn its Calamity at 50% health.
Every tick, a Womb has a 1% chance to call over all Infected, Evolved, Hyper Evolved, Bairns, Scampers, and Gastgebers within a 50 block radius for it to eat. It does this by setting the Mob's search position to the Womb, so the Mobs will only come over if they aren't actively doing anything.
Every 2 seconds, Wombs will detect if they're suffocating in a wall or not. If a Womb is, it will attempt to break all blocks around itself. It can break blocks up to a hardness of 9.
Is completely ignored by the Despawning System.
Womb Crafting System
The Womb Crafting System allows Calamities born from Wombs to inherit traits from Mobs that were consumed by the Womb. Specific Mobs, if eaten by a Womb, will apply custom Attributes to the resulting Calamity, creating a lot of possible variety. A Calamity can have multiple Attributes, and the level of each Attribute caps out at level 64. When right clicking a Womb in Creative mode, it will display a UI of what Mobs give what attributes.
Ballistic Attribute
Per Griefer, Napalm Griefer variant, Kamikaze Phayres variant, and Bomber Spitter variant, the max number of projectiles the Calamity can shoot is increased by three. Calamities with the Ballistic Attribute appear gray.
Toxic Attribute
Per Toxic Griefer variant, Noxious Phayres variant, and Laced Verdathorn variant, the Calamity will deal an additional amplifier of Poison. The duration of the effect is always 20 seconds. Calamities with the Toxic Attribute appear dark green.
Laceration Attribute
Per Knight, Impaler Slasher variant, and Lacerator, the minimal melee damage the Calamity will deal is increased by 10%. Calamities with the Laceration Attribute appear red.
Corrosive Attribute
Per Spitter, Bile Spitter variant, Dual Spitter variant, and Sniper Spitter variant, the Calamity will deal an additional amplifier of Corrosion. The duration of the effect is always 20 seconds. Calamities with the Corrosive Attribute appear bright green.
Grinding Attribute
Per Infected Vindicator, Wendigo, and Axtwerfer, the Calamity will deal an additional 10 damage to the durability of every piece of armor the target is wearing. Calamities with the Grinding Attribute appear dark blue.
Localization Attribute
Per Braiomil and Brotkatze, the Calamity will deal an additional amplifier of Marker. The duration of the effect is always 20 seconds. Calamities with the Localization Attribute appear yellow.
Rejuvenation Attribute
Per Infected Witch, Volatile, and Hexenmeister, the Calamity will receive an additional amplifier of Regeneration when applying it via Kill Points. Calamities with the Rejuvenation Attribute appear purple.
Behavior
Wombs are incapable of movement.
Wombs will attempt to burrow and despawn if there are 5 other Organoids in a 36 block range around it, though they are incapable of despawning this way.
Able to breath underwater.
Wombs have a type of passive regeneration. This is disabled while they are under the effects of the cold.
Related Advancements
Drops
Womb
Statistics
HP: 30 (x15 hearts)
Armor: 6 (x3 bars)
Damage: 0 (x0 hearts)
ID: spore:reconstructor
Threat Level: Variable
Trivia
Wombs are referred to as "Biomass Reformator" and "Reconstructor" in the code.
The ability to right click the Womb in Creative mode to display the Womb Crafting System was originally done to make putting information about it on the wiki easier.
The Verwahrung prompted the mod creator to consider a redesign of the Womb, which did end up happening.
Gallery
The second stage of the Womb.
The third stage of the Womb.
A Womb birthing a Sieger.
A picture posted in the Discord server teasing Calamity Attributes before they were released.
Ditto.