The Endergetic Expansion

Overview

The Endergetic Expansion is a Forge mod focused on overhauling the End dimension with new biomes, creatures, blocks, and mechanics. While still in early beta, it already introduces a fully realized biome called the Poise Forest, which generates on the outer End islands alongside the vanilla Chorus biome. Inside this forest you'll find an entire ecosystem of purple-tinted vegetation, floating Poise Clusters, tameable Booflo creatures, Puff Bug hives, Bolloom Buds that grow fruit and balloons, and a full set of Poise wood building blocks.

The mod also enhances the existing End experience with improved End Well and End Gateway visuals, a new Corrock block type that transforms based on which dimension it's in, and Eumus, a new soil block exclusive to the End. You can browse all 61 items and blocks the mod adds using the Items tab above, and check the Recipes tab for crafting details.

The Poise Forest Biome

The Poise Forest is the centerpiece of The Endergetic Expansion. It generates on the outer End islands with a biome weight of 6, making it semi-rare but not exceedingly difficult to find. The biome features a custom surface of Poise Grass Block on top of End Stone, with patches of Poismoss Eumus and regular Eumus mixed in. The sky takes on a distinctive pinkish hue (color code #B1FBA3) compared to the standard End sky.

The biome generates several unique structures. Poise Domes are large dome-shaped formations made of Poise Grass Block. Poise Trees feature trunks of Poise Log with some sections that glow. Poise Clusters float throughout the biome as translucent purple blocks. Puff Bug Hives hang from the trees, and Bolloom Buds dot the forest floor. Short and tall Poise Grass plants cover the ground surface.

Poise Wood Set

The Poise wood type is a complete building material set. From Poise Logs you can craft Poise Planks, and from there all standard wood derivatives: Slabs, Stairs, Fences, Fence Gates, Doors, Trapdoors, Pressure Plates, and Buttons. The wood has a muted purple-gray appearance that works well for End-themed builds. Poise Logs can be stripped like vanilla logs, and there are dedicated Poise Wood (bark) blocks as well. The mod also includes a Poise Boat for water travel.

Some Poise Log variants glow naturally, labeled as Glowing Poise Log and Glowing Poise Wood. These emit light and add atmospheric lighting to the forest canopy. They cannot be stripped.

Creatures of the Poise Forest

Booflo

Booflos are the signature creature of the Poise Forest, large frog-like mobs that can inflate and fly. Adult Booflos have 40 HP, 4.0 attack damage, and a movement speed of 1.05. They spawn naturally in the biome with a weight of 15, making them fairly common. Booflos go through a full life cycle: Baby Booflos (5 HP) grow into Adolescent Booflos (10 HP), which eventually mature into full adults.

The Booflo's most distinctive behavior is the boof, an explosive inflation that launches it into the air and knocks back nearby entities in a 3.5 block radius. When the boof is powerful enough (offensive strength above 2.0), it also deals damage based on the Booflo's attack stat. Booflos hop around on the ground and can inflate to glide through the air, making them dynamic and engaging creatures to watch.

Booflos hunt Puff Bugs as part of their natural behavior and will eat Bolloom Fruit they find on the ground. They have specific AI goals for swimming, slamming down from the air, hopping, breeding, and chasing prey.

Riding a Tamed Booflo

Once tamed, right-click a Booflo (when it's not pregnant) to mount it. You can steer the Booflo using standard movement controls. The Booflo can be boosted while riding, launching both you and the Booflo into the air with the boof mechanic. This makes tamed Booflos an excellent way to traverse the treacherous End islands. You can also dye a tamed Booflo's bracelets any color by right-clicking with a Dye item.

Tamed Booflos can breed when fed Poise Cluster blocks. Both parents must be tamed and on the ground for breeding to work. After breeding, a Baby Booflo spawns and rides on the parent's back. There is a cooldown of 1400 ticks (70 seconds) before a Booflo can breed again.

Puff Bug

Puff Bugs are small floating creatures with 8 HP that live in Puff Bug Hives hanging from Poise trees. They have a flight speed of 0.75 and can inflate and deflate, changing their size between three states. Puff Bugs can be captured in a Glass Bottle to create a Puff Bug Bottle, which works similarly to a Bucket of Fish. Right-clicking with the bottle releases the Puff Bug back into the world.

Puff Bug Bottles can also be dispensed from Dispensers. An interesting feature is that Puff Bugs can store potion effects; if a captured Puff Bug has active effects, the bottle's tooltip displays them with color-coded text (blue for beneficial, red for harmful).

Bolloom System

Bolloom Buds and Fruit

Bolloom Buds are rare-quality blocks found on the Poise Forest floor. They can only be placed on Poise Grass Block, End Stone, Eumus, or Poismoss Eumus, and they enforce spacing rules: no two buds can be within 2 blocks of each other (including diagonals). Right-clicking a closed Bolloom Bud opens its petals, triggering the bud to start growing Bolloom Fruit on vines that extend upward.

Bolloom Fruit is an edible item that restores 2 hunger and 0.3 saturation. It always applies Levitation I for 6.25 seconds (125 ticks) when eaten, and it also sets a food cooldown of 25 ticks. While eating it yourself is rarely practical, Bolloom Fruit is essential for taming Booflos and is the item that Booflos are tempted by.

Bolloom Balloons

Bolloom Balloons are decorative items available in every vanilla dye color plus an undyed variant (17 total colors). Right-click a Fence with a Bolloom Balloon to tie it, creating a Bolloom Knot entity on the fence post with the balloon floating above. Multiple balloons can be tied to the same fence post. The space above the fence must be clear (3 blocks of air) for the balloon to attach.

Bolloom Balloons can also be dispensed from Dispensers. When dispensed into open air, they create a free-floating balloon entity. When dispensed onto a Fence, they attach via a knot just like manual placement. Balloons stack up to 16.

Unique Blocks and Materials

Poise Clusters

Poise Clusters are translucent purple blocks that generate throughout the Poise Forest. They have a unique interaction: when mined without Shears, the block doesn't simply break. Instead, it transforms into a floating Poise Cluster entity that rises 10 blocks into the air before re-solidifying. Only Shears will harvest the block normally. Arrows and Tridents that hit a Poise Cluster also trigger this floating behavior, launching the cluster skyward and destroying the projectile. Poise Clusters emit poise bubble particles from their top surface.

Corrock

Corrock is a dimension-adaptive block type, one of the mod's most unique mechanics. There are three forms of Corrock: Overworld, Nether, and End variants. When a Corrock block is placed in the wrong dimension, it gradually transforms (with a random delay of 60 to 100 ticks) into the variant matching its current dimension. The End variant is the "native" form found in the Poise Forest.

Corrock comes in three block types: the Corrock plant (a decorative block placed on solid ground), the Corrock Block (a full cube, mined with a Pickaxe), and the Corrock Crown (a glowing decorative block that can be placed standing on surfaces or mounted on walls). Corrock Crowns can even be placed upside-down on ceilings. Corrock Blocks will resist transformation when submerged in Water.

Eumus and Eumus Bricks

Eumus is a soil block found in the Poise Forest, mined with a Shovel. It functions as a ground layer beneath the Poise Grass and can be crafted into Eumus Bricks for building. The Eumus Brick set includes standard Bricks, Chiseled Bricks, Brick Slabs, Brick Stairs, and Brick Walls, giving builders a good range of decorative options. Poismoss Eumus is a grass-covered variant that spreads to adjacent Eumus blocks under the right light conditions, similar to how Grass spreads to Dirt.

Special Blocks

Boof Block

The Boof Block is an interactive block with trampoline-like behavior. When an entity lands on it without sneaking, fall damage is completely negated and the entity bounces. Sneaking on a Boof Block applies normal fall damage instead. The block can be triggered to "boof" (activate), which spawns an expanding Boof Block entity that pushes nearby mobs and items away. Boof Blocks can also be dispensed from Dispensers, creating a directional boof effect in front of the Dispenser. Mobs treat Boof Blocks as hazardous and avoid pathfinding through them.

Acidian Lantern

The Acidian Lantern is a light source block found in the Poise Forest. It provides illumination and has a distinctive End-themed appearance, making it useful for both functional lighting and decoration.

Mystical Obsidian

The mod adds several Mystical Obsidian variants that relate to the mod's enhanced End portal mechanics. These include Mystical Obsidian, Mystical Obsidian Wall, Mystical Obsidian Rune, and Mystical Obsidian Activation Rune (with an active variant that emits light level 5). These blocks are used in the mod's visual overhaul of End structures. The Crystal Holder block is also part of this set, used for the enhanced End Crystal placement. The mod replaces the vanilla End Crystal item with its own version that interacts with these new portal blocks.

Equipment and Items

Booflo Vest

The Booflo Vest is a chestplate armor piece crafted from Booflo Hide, which drops from Booflos. It provides 3 armor points in every slot equivalent (the material defines 3 for each of the four armor slots) with 0.0 toughness and 8 enchantability. Its durability multiplier is 32, making it reasonably durable with a chestplate durability of 512 (32 x 16). The vest has a special "boof" ability that, when activated, visually inflates and provides a short burst effect. After boofing, the vest takes 2 durability damage and enters a cooldown of 100 ticks (5 seconds).

The Booflo Vest can be repaired using Booflo Hide at an Anvil. Booflo Hide stacks to 16, so plan your hunts accordingly when collecting repair materials.

Eumus Brick

The Eumus Brick is a crafting material (stacks to 64) used to create the Eumus Brick building set. Smelt Eumus in a Furnace to produce Eumus Bricks, then combine them on a Crafting Table for the full range of decorative blocks.

Flora and Vegetation

The Poise Forest floor is covered in several types of vegetation that can be bone-mealed and spread. Poise Grass Block behaves like vanilla Grass Block: it requires Pickaxe harvest level 2 to mine and reverts to End Stone if covered by an opaque block blocking light. Bone-mealing Poise Grass Block grows Poise Grass plants on top of it.

Poise Grass (short) and Tall Poise Grass are decorative plants that emit poise bubble particles. Short Poise Grass can be bone-mealed to grow into Tall Poise Grass. The tall variant can itself be bone-mealed to grow a full Poise Tree, similar to how Saplings work. All Poise grass plants can only be placed on Poise Grass Block, Poismoss Eumus, or Eumus.

Frisbloom is a multi-stage flower that grows on End Stone. It starts as a Frisbloom Bud that can grow through 4 layers, with each growth stage extending the Frisbloom Stem upward. The growth is random-tick driven and the bud must have air above it to continue growing. Once it reaches layer 3, the bud transforms into a complete Frisbloom Stem.

Ender Fire and Visual Enhancements

The mod adds Ender Fire, a purple-tinted fire variant based on vanilla fire properties. This adds to the End's atmosphere and ties into the overall visual overhaul the mod provides for the dimension.

The Endergetic Expansion also visually enhances the existing End Well (the portal frame in Strongholds) and End Gateways that generate after defeating the Ender Dragon. These changes are cosmetic, making the structures feel more in line with the expanded End dimension aesthetic. The mod replaces the vanilla End Crystal item with an enhanced version that interacts with the new Mystical Obsidian portal blocks.

Cross-Mod Compatibility

The Endergetic Expansion has built-in compatibility with several popular mods. Quark support adds Vertical Planks, Vertical Slabs, a Bookshelf, and a Ladder variant for Poise wood, plus Eumus Brick Vertical Slabs. The mod is also compatible with Buzzier Bees and Boatload, both made by the same team (Team Abnormals). These integrations expand when all mods are loaded together, adding additional content and interactions.