Introduction
Welcome! Have you in the past built fortifications, prepared your base, crafted armor and secured your chests, then noticed that no threat ever shows up? This mod seeks to fix that. If you feel the regular mobs just aren’t quite up to the challenge and you want to really test your defenses, then try this out. It also enables some useful recipes and items.
Invasion Mod gives you the ability to initiate an attack on the location of your choosing. The difficulty steadily ramps up and the mobs are designed to deal with base defenses. The behaviour of all invading mobs has been extensively revamped. Most mobs have new abilities and in this beta stage there are some new mobs and substantially more powerful mobs on the way, geared towards new roles.
Features:

  • Spawn an invasion until a nexus is overwhelmed(most reliable way to test your base and no down time).
  • Leave mobs to spawn around a nexus every couple nights if you want to go off and do other things.
  • Set mobs to instead spawn randomly at night, like usual mobs but a lot more of them(customisable).
  • Items available, like rechargeable traps, to help defend.

Note: the nexus acts as a beacon and GUI for invasions(that’s why it’s there), but mobs spawning at night don’t yet have any way of organising themselves around a player or central point.
Update info:
0.9.4 should be compatible with 1.2.5, with the appropriate
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/MP
Mod Guide
The Nexus and How to Use It
The nexus is the central block of the entire mod. Crafting a catalyst and putting it into the nexus’s item slot will begin to activate it. Once fully activated, it will begin to generate rift flux, a useful resource, by using minecraft’s dimensional space, similar to how portals to the nether or aether work. There are two modes the nexus can be in:
Invasion Mode
Activated by inserting a regular Nexus Catalyst. Once tapped into a rift to this degree, disengaging is extremely unsafe – it cannot be deactivated! In fact, the block will become unbreakable during this state, though it can be damaged.
You get flux, but the other side of this is that mobs will begin to spawn a certain distance away, attracted to the nexus. Mobs will attack players and, given the chance, the nexus itself. If the nexus ever reaches 0%, the activation is broken and the invasion ends in a nasty way to all living things in the area, so be warned!(to clarify, it doesn’t damage any blocks, just living things, and remains afterwards) A nexus is pretty tough though, and its damage state is highly visible.
Continuous Mode
Activated by inserting a Stable Catalyst, the nexus generates flux much more slowly. Mobs sometimes can attack at night, so be prepared. You can tell by sunset whether the nexus will be attacked that night or not. Over time, the nexus gradually charges up. This results in faster flux generation but attacks by mobs become much stronger. Failing to keep the nexus safe will inevitably cause a partial discharge as the mobs overwhelm it, but successful defenses will allow the nexus to reach higher and higher power levels. The discharge in this state is not enough to harm the player, though. You can control the nexus in this state to some degree with damping agents, including shutting it down if needed, but it’s not instant.
To defend the nexus in continuous mode, you must deal with the mobs who have destabilised the rift and forced their way into the world. Killing enough of them to restabilise the rift will let the nexus safely draw more energy and help you secure the area.
In the case of exiting and reloading the game (given minecraft was able to save), both SMP and SP nexuses should be restored to the state you left it in. You can also adjust the nexus range to suit your base. The range is roughly the area the nexus influences and the range at which mobs will spawn. By default it is 60 blocks outward. In SMP an op can adjust it by using ‘/invasion range [x]‘ as a command. In SP, for the moment, you can place 2-8 dirt blocks in the nexus to change the range to between 32-128. Don’t worry, the range is very visible on the nexus interface.
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Here’s a quick overview of the nexus interface. A catalyst in the left slot will begin to activate the the nexus, progress being the red bar. This nexus is already active and “locked in”. The slot on the right is where rift flux is generated, along with its progress bar too. Wave number is the current intensity of the attack while nexus level is the the furthest wave this nexus has ever reached. It also tracks the total number of mobs’ demise since it was placed.
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Making a nexus involves taking an obsidian block as a base and crafting it with three redstone and a phase crystal.
Nexus

To make the important phase crystal needed, you will need one diamond and some redstone. Don’t worry, a nexus is good at generating resources back.
Phase Crystal
Night Spawns
The nexus is not a requirement to get lots of invasion mobs spawning. It’s not enabled by default, but you can replace regular random mob spawns at night with as many invasion mobs as you like, and of what type. Mobs will only break blocks if they are actively chasing a player and can be set up to see variable distances. Otherwise, they burn in sunlight similarly to regular mobs. Standby in the future for more behaviours.
To enable this, find ‘invasion_config.txt’ in your minecraft folder after running the mod once. You should open it in notepad and you can simply change values and save. For example, change enable-night-spawns from ‘false’ to ‘true’.
-Mob spawn chance. This is the overall rate of custom mobs spawning.
-Maximum number of mobs existing at once.
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’s default is 70 but you can override this.
-Sight range. This is how far they can see you, in number of blocks.
-Sense range. Similarly, this is how far away they can feel your presence and know you’re there.
-Maximum group size. This up to how many mobs might spawn together in one spot.
With spawn types unchanged, various types of zombies and spiders spawn in place of their basic counterparts. You can change this though, adding any other type of invasion mob and how often they spawn – for example ALL skeletons with some pig engineers. This is easy to set up in the config file.
Items
Rift Flux
This material is slowly generated by the nexus when it is active and can be used to craft things such as diamonds or infused swords currently. Armor and more items will come. You can also find glowing remnants on some attackers that you can craft together into rift flux.
Glowing Remnants to Rift Flux

One use is to craft them into diamonds, though it still takes significant effort given the rate of flux generation.
Rift Flux to various items

You could also use them to make one of several useful items, such as the infused sword.
Infused Sword

This adds a special on-use effect to a diamond sword. Hitting mobs charges it up, which happens quite quickly. When charged, activation by right-click will instantly heal you for 3 hearts. We’ve found this item really helps in a pinch and helps keep up with a lot mobs. You can also use it anywhere in minecraft.
Searing Bow

A bow with a new feature: You can hold back longer to charge up a fiery arrow that pierces through a number of enemies(if you can line them up) while setting them on fire. Though, against single targets the only real bonus is setting them on fire if you decide to, at the cost of more time to shoot. Without charging all the way, you can shoot an arrow at the normal time for a plain bow to shoot and the arrow will be the same. After that, no more direct damage is gained except a small bonus with the special.
Nexus Adjuster

This simple item lets you adjust the nexus range on the cheap. It works in SP and SMP (or use the ‘/invasion range <x>’ command in SMP).
Material Probe

An upgrade of the adjuster, with a rick-click the material probe also lets you measure the strength of any block as far as invasion mobs are concerned. You should be able to see how bonuses stack and what strength values are without checking a spreadsheet. The probe also can recover traps without triggered them, so you can move or store them.
Traps
Empty Trap

Kind of an empty frame, you can turn these into different kinds of traps. They are always reusable and quite user-friendly, except the one case where you stand on one. The goal of using these is to help keep area control despite being outnumbered, especially in the case of having no buddy to cover your back. You can hear them go off and the rift trap even has an area stun against invasion mobs.
To use one, right-click somewhere on the ground to place it down. After a few seconds it will arm and can be triggered by things walking over it. After the payload is spent, the trap sits there empty. You can pick empty traps up as if they were items (they don’t dissapear or lag as they are not items). If you want to remove an untriggered trap, you can use a material probe to safely recover it, otherwise it will drop as an empty trap item if the block underneath is removed.
Flame Trap (folded)

Note that when crafting with buckets, you get the bucket back.
The flame trap, predictably, bursts into a 3×3 fireball when triggered. The fire stays around for a little while like a fire shield, but it tends to block players too.
Rift Trap (folded)

Rift traps are created by charging empty traps in a nexus. At the moment this is the only block that charges them, but other devices could be added (or different traps). These traps usually kill the mob that stands on it, but also does some damage to mobs in an area around it and stuns them for a few seconds. The stun only works on invasion mobs at the moment for technical reasons.
Don’t worry too much about the charging interfering with flux generation. They both go on at the same time, the current item in the output slot just blocks the other item, like in a furnace.
Strange Bone

Feeding this bone to a wolf you own will bind it to a nexus if it is nearby (several blocks). Your wolf will then respawn at that nexus if it dies. A purple collar indicates the wolf it bound. It also gains some mob attacking behaviour when not sitting.
Nexus Items
Catalysts
These items are essentially the fuel for the nexus. It is a one-time cost to activate the nexus, putting it in its generating state. Then, other conditions take over.
- Nexus Catalyst: Activates invasion mode, generating more flux and causing lots of mobs to attack until you are overwhelmed
- Stable Catalyst: Activates continuous mode. Mobs often engage in night attacks. Difficulty and flux generation increases over time if you keep successfully defending.
Recipes create a mixture. Baking the mixture in a furnace produces the final catalyst.
Catalyst Mixture and Nexus Catalyst

Stable Mixture and Stable Catalyst

Damping Agents
These items currently help control the nexus in continuous mode
Damping Agent

This item prevents the nexus from increasing its power in continuous mode while it is in the slot. It is retrievable.
Strong Damping Agent

The stronger variant actually causes the nexus charge to dissipate quickly in continuous mode. It is, again, removable. If power reaches zero the nexus will deactivate safely.
Mobs
These are the mobs that will try to kill you. The bulk of the attack forces right now are traditional minecraft mobs, except with all-new behaviour and a purpose behind it. As mentioned, armor is still recommended. I can’t give an ETA, but expect the nether to play a part in this, as well as the End. Also expect completely new avenues of attack. Are you sure that’s firm ground you’re standing on?
Zombies
Tier 1

- Almost a regular zombie, can claw through blocks and sometimes carries items
Tier 2

- Much more durable than regular zombies and can carry better items. A (broken)sword, for example, gives a large attack boost but they lose the ability to destroy blocks.
- Tar zombies are from swamps and are highly flammable
Spider
Tier 1

- Scales walls with ease and is very fast
Tier 2

- In addition to being fast, has amazing jumping ability and can pounce over distances
Skeleton

- Tries to support from range with its bow
–the unnamed siege mob–


  • Beefy, boulder-throwing siege mob. Very dangerous when left alone.
  • Also has a destructive slam on an 8 second cooldown that can really hurt walls
  • His art and exact mechanics are currently being looked at, compared to other mobs being worked on. He’s here for now though.

The Nether
Pig Engineer


  • Attemps to defeat terrain obstacles and prefers not to attack a player
  • Places blocks to try and get over moats of fire, lava or just any hazardous obstacle he can manage
  • Places ladders to create paths upwards and is the only mob that can tunnel directly upwards
  • Each pig engineer has building materials but can run out

Zombie Pigman



  • Like in the nether, zombie pigmen are resistant to fire
  • Can also destroy blocks after making its way through a fire hazard
Block Strength
Blocks have a certain strength against invasion mobs when it comes to digging through them. These can be different from the hardness of the material when a player tries to mine it, but it does determine how long it takes for a mob to dig through. Some blocks also get certain bonuses. Here are some of the block strengths, and the material probe item can tell you these values in-game.
Some Soft Materials

  • Dirt: 3.16
  • Sand, Gravel: 2.5
  • Glass, Glowstone: 2.5 (brittle)
  • Leaves, Vines: 1.25
  • Tall grass: 0.3
  • Netherrack: 3.85

Some Hard Materials

  • Wood, Planks: 5.5
  • Stone, cobblestone, stone bricks: 5.5 Max: 8.25

A construction bonus for these stone-based blocks gives them +10% extra strength for every adjacent stone-based block. This means up/down and left/right, but not diagonals(the blocks must be touching).

  • Netherbrick: 5.5 Max: 8.25 (10% bonus per adjacent netherbrick)
  • Sandstone: 5.5 Max: 8.25 (10% bonus per adjacent sandstone)
  • Obsidian: 7.7 Special: 50% chance to deflect projectiles like boulders
  • Steel: 7.7
Config
There’s a config file, ‘invasion_config.txt’, that gets created in your minecraft folder after running the mod once. This has extra stuff in it that you might need:

  • Night spawns (has its own section describing all this)
  • Block and item IDs
  • Disable crafting items
  • Set custom block strengths
Installation
Single Player

  • Remember to backup your world regularly. Also, don’t worry about the client and server version numbers not matching up. Some updates only apply to one of them. If they are both the most recent, they will work together.
  • Requirement 1. Not installed a mod this way before? Find your minecraft.jar and delete the META-INF folder before you forget. Black screens just aren’t fun. If you need help locating your minecraft.jar and minecraft install folder, check this amazingly clear guide.
  • Requirement 2. Download
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    ’s ModLoader. If you don’t already have it. Install it by extracting(copying) its contents into your minecraft.jar file. You can do this with drag and drop between two windows.
  • Requirement 3. Download ModLoaderMp Client. This is required no matter what, even if you only play single player. Install this the same way, by extracting it into your minecraft.jar and overwriting.

[1.2.5]Invasion Mod Client 0.9.4:


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1. Open the download and, like with ModLoader, extract the contents of it into your minecraft.jar. There should be an ‘invmod’ folder and a mod_Invasion.class that go straight into the minecraft jar. Now you’re done!
Server for SMP
Requirement 1. Download SDK’s ModLoaderMp Server . Extract this into your minecraft server.jar.
[1.2.5]Invasion Mod Server 0.9.4:


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1. Extract the contents of the download into your minecraft server.jar. Done.
Note: In SMP, there are some commands for increased control. An op can use the command ‘/invasion end’ to turn off a nexus if it’s needed. You also can change the nexus range for larger bases with the command ‘/invasion range [x]‘ where x is between 32 and 128. This is number of blocks in distance from the nexus that spawn points will be looked for.
Credits to:

  • Elsee
  • Lieu

Link:
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