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KomradeSpectre-Aetherium-0.4.7 icon


A mod that currently adds 13 varied items to Risk of Rain 2 and now fully customizable with configs! Now completely rewritten!

Date uploaded 4 months ago
Version 0.4.7
Download link
Downloads 13801
Dependency string KomradeSpectre-Aetherium-0.4.7

This mod requires the following mods to function

bbepis-BepInExPack-5.4.9 icon

Unified BepInEx all-in-one modding pack - plugin framework, detour library

Preferred version: 5.4.9
tristanmcpherson-R2API-3.0.13 icon

A modding API for Risk of Rain 2

Preferred version: 3.0.13


What is Aetherium?

Aetherium is a mod for Risk of Rain 2 that adds in a few items of varying tiers.
Most of the item ideas listed were sourced from the ideas channel on the official discord,
and as such the ones that were I will list the person that came up with the idea next to them.

Items (so far):

Icon Item Description Rarity Original Idea by
Feathered Plume Gain a temporary 7% speed boost upon taking damage that stacks 3 times for 5 seconds. (+3 stacks and +0.5 second duration per additional Feathered Plume.) White Ajarl
Blood Soaked Shield Killing an enemy restores 10% max shield (+10% per stack hyperbolically.) The first of the stack of this item will grant 8% of your max health as shield on pickup. Green Kaboose
Shark Teeth 25% of damage taken (+25% per stack hyperbolically) is distributed to you over 5 seconds as bleed damage. Green FancyFrenc
Shielding Core You gain 10 (+5 per stack) armor while BLUE shields are active. The first stack of this item will grant 4% of your max health as shield on pickup. Green NepNep
Blaster Sword At full health, most attacks will fire out a sword beam that has 200% of your damage (+50% per stack) when it explodes after having impaled an enemy for a short duration. Red Bord
Inspiring Drone Any bots you own gain a 50% boost to each of its stats based on yours (+50% per stack). Some bots gain more ammo for their attacks based on the bonus to their attack speed, and have their ammo replenished twice as fast per additional Inspiring Drone. Finally, if an inspired bot is too far away from you, it is teleported to you after a delay (40 seconds for Turrets, 30 seconds for Drones). Red Kaboose (original) Me (modification)
Witches Ring Hits that deal 500% damage or more will trigger On Kill effects. Upon success, the target hit is granted immunity to this effect for 5 seconds (-10% duration per stack, hyperbolically.) Red Me
Accursed Potion Every 30 seconds (reduced by 25% per stack) you are forced to drink a strange potion, sharing its effects with enemies in a 20m radius (+5m per stack) around you. Max: 8 buffs or debuffs can be applied at any time. Lunar Shadokuro
Alien Magnet Enemies hit by your attacks will be pulled towards you, starting at 6x force (+1 force multiplier, up to 10x total force. The effect is more noticeable on higher health enemies. Lunar Me
Heart of the Void On death, cause a void implosion with a radius of 15m (+7.5m per stack) that revives you if an enemy is killed by it BUT at 30% health (+5% per stack, max 99%) or lower, all kinds of healing are converted to damage. Lunar Hyperion_21
Unstable Design Every 30 seconds you are compelled to create a very 'FRIENDLY' Lunar Chimera, if one of your creations does not already exist. It has a 400% base damage boost (+100% per stack), a 10% base HP boost (+10% per stack), a 300% base attack speed boost, and finally a 24% base movement speed boost (+24% per stack). This monstrosity can level up from kills. Lunar SpookyBoogie
Weighted Anklet Gain a 25% reduction to knockback from attacks (+25% per stack (up to 100%) linearly). Lose 10% move speed (+10% per stack (up to 40%) linearly) Lunar Me

Equipment (so far):

Icon Equipment Description Type Original Idea by
Jar of Reshaping On activation, absorb projectiles in a 20m radius for 3 second(s). Upon success, fire all of the projectiles out of the jar upon next activation. The damage traits of each projectiles fired from the jar depends on the bullets you absorbed. After all the projectiles have been fired from the jar, it will need to cool down. Normal Me


  • Version 1.0.0 will include a new survivor, we're building up to that.

  • ItemStatsMod integration soon, possibly 0.4.3.

  • The Key of Solomon idea is being brainstormed, but will still likely focus on stealing skills from enemies. However, those skills will likely be custom made by me, who knows.

  • Weighted Anklet will be reworked soon to be more desirable. How I'll do that? I'll have to think on it.

  • Make kills by the Lunar Chimera give half XP/Half Gold to the Unstable Design wielder. Make its spawn behavior configurable between individual per player or similar to halcyon seed.

  • Will be adding more custom VFX/SFX to the Jar of Reshaping now that I'm more familiar with effect networking.


+ GRRRR, thunderstore markdown.

+ Added configs to enable/disable items and equipment.
+ Added configs to allow blacklisting items so AI may never use/acquire them.
+ Retouched icons for buffs.
+ Made this readme more legible.
+ Made preparations for Pheromone Sac (0.5.0), will be releasing with another item.
- Removed obscure feature.

+ Another hotfix. Forgot to set the correct access level on some classes. It's fixed now, this should be the last hotfix, next update should be more items.

+ Quick hotfix to address R2API weirdness due to previously using the experimental build. Woopsies!

+ AETHERIUM REWRITE. Lots of refactoring had to be done, but now my process of item creation should be the default R2API way to do it. This means others can probably learn from it easier now.
+ Nerfed Shark Teeth default # of ticks value from 10 to 5 (As a result, it has more damage per these ticks vs Before.) Suggestion by Breadguy.
+ Nerfed Alien Magnet default starting force 6->3, force per stack 1->2 (To make it worth picking up more than one.) Suggestion by Breadguy.
+ Fixed Alien Magnet's force calculations to now work properly on things without a character motor. (Thanks to Chen for this)
+ Assorted fixes for Inspiring Drone and Unstable Design. (Thanks to Chen for this)
+ Added Texture to Shark Teeth.
+ Added an animation to Alien Magnet.
+ Made Alien Magnet use the ItemFollower system.
+ Retouched Icons, still working on these as development goes on.
+ Made the non-impale Blaster Sword projectile speeeeeeeeeeeeeeeeeeeen.
- Removed TILER2 dependency, migrated to my own ItemBase now.

+ Added Witches Ring.
+ Fixed DOT effects doing nothing on the Accursed Potion. Be wary of how many potions you have now.
+ Fixed a weird bug involving loading due to TILER2.

+ Quick hotfix by Chen. Bots that had stocks able to be modified by Inspiring Drone couldn't fire if their owner didn't have an Inspiring Drone, woops, fixed now.

Special Thanks

ThinkInvis - I learned a whole lot of things from their Classic Items mod. Thanks to them for authorizing me to use TILER2's stathooks in my itembase, it was integral in getting it off the ground.
Chen - Fixed turrets teleporting into the ground with Inspiring Drone. Provided me a snazzy build event to let me test things faster now. Put in a ton of work to highly improve the Inspiring Drone's code as well, can't thank them enough for it.
Harb - For providing the ILHook from their HarbCrate mod, which allows Bloodsoaked Shield and Shielding Core to be able to provide some base shields.
RyanP - We reference his void implosion (from his Flood Warning warden elites) as basis for our void implosion, albeit modified a bit to work for our item.
Rob - For varied questions relating to coding on ROR2. Also for helping solve some issues regarding ItemDisplay rendering.
OkIGotIt (referencing Rico) - For providing a code snippet for ItemDisplays which let me learn how to have them show up in the first place.
Rico - For the above, and for creating a timer component for me to fix an annoying Voidheart issue that I couldn't solve.
Rolo - For providing a projectile code example, which allowed us to use it as a basis to create Blaster Sword with heavy modifications.
BordListian - Basically co-dev support in creating this and playtesting.
GrimTheWanderer - Playtesting.
WaltzingPhantom - For providing alternative icon art for Feathered Plume, Blood Soaked Shield, Shark Teeth, and Shielding Core!
Various ROR2 Modding Core Developers and Modders - Answering questions related to modding for ROR2 at random stages during development of version 0.1.0.
753 - Providing a crystallization shader for me to use in the future.
Lorc ( - For the base feather icon I did a small edit to for Feathered Plume's speed buff.