The Atomic Vessel (Base Class Concept)


Homebrew and House Rules


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So this is an idea that originally sprung up from an older homebrewed martial discipline that someone made for dnd 3.5 that was based around the manipulation of nuclear energy. While I really liked the concept of that it felt pretty clunky as a martial discipline, with some odd functions independent of the class using it that made for a lot of interesting (or confusing) interactions. Many years later I revisited the idea and thought it would be fun to try and design a class that revolved around the concept of using nuclear fusion/fission as their prime power source. I did however borrow several of the initial creations abilities since they fit very well, and attempted to integrate them into the pathfinder system more as a primary class ability.

While I am aware that pathfinder has some rules about radiation and such I didn't focus primarily on those since they seemed to be mainly surrounding prolonged exposure to radiation rather than the rapid application. I hope to get some thoughts and opinions of the class before putting it into primary play testing, so without further ado here is:

The Atomic Vessel


Bump for hopeful thoughts.

Scarab Sages

I skimmed it a while back. Novel! Maybe not the way I'd do it, but pretty impressive. I could see it fitting into Starfinder.

Liberty's Edge

It looks like it'd be a lot of fun to play. Once my PCs get their butt off Golarion I'll be sure to use this class for at least one NPC.

I have to wonder - were you inspired at all by Sundancer for Red Giant?

Also, what conditions need to be met to heal Unforeseen Side Effects? And is it intended for the side effects to sometimes have no bearing on a given character's abilities (e.g. fighter gets hit with Reverse Engineer)?


@gark thank you for pointing that out about u foreseen side effects, I totally forgot to add in the duration on it. It should now have the correct duration of lasting one minute. And yeah it's meant to be sorta random as a way to kinda mitigate how often you can proc the effect of it and to kinda emulate its more "mutation"ish thing I was going for. And actually I've never seen anything about that character lol.

@Hiding, novel isn't bad and I'll take it heh. I'm not really familiar with starfinder though.

Silver Crusade RPG Superstar 2014 Top 16

I could see this being merged into a Kineticist archetype. Overheat seems like a perfect example of something that could be a wild talent to alter the kinetic blast, for example.


If you want to model radiation effects realistically you may want to skim over some health physics material, which is the study of health effects from radiation. GURPS also does a very good job of modeling radiation, with increasing bad stuff happening to you as your radiation dose increases.

I have considered making radiation based spells in Pathfinder, but I thought that keeping track of radiation dose and the complex effects of radiation would be cumbersome and I felt that the official system of Con damage only wasn't realistic, so I never pursued the radiation spells. By profession I am a nuclear engineer and I game with other nuclear engineers and scientists, so I would definitely get called out if I introduced unrealistic radiation spells.


Good to have some free Atomic vessel stuff out there. ;)


relativemass wrote:

If you want to model radiation effects realistically you may want to skim over some health physics material, which is the study of health effects from radiation. GURPS also does a very good job of modeling radiation, with increasing bad stuff happening to you as your radiation dose increases.

I have considered making radiation based spells in Pathfinder, but I thought that keeping track of radiation dose and the complex effects of radiation would be cumbersome and I felt that the official system of Con damage only wasn't realistic, so I never pursued the radiation spells. By profession I am a nuclear engineer and I game with other nuclear engineers and scientists, so I would definitely get called out if I introduced unrealistic radiation spells.

Not being super well versed in the physics of true to life radiation and it's effects on it's effects on both living an nonliving tissue beyond a cursory knowledge I didn't want to really over complicate the nature of the class. I to thought that it might be cumbersome to actually track such a thing, so instead I went with a more fantasy world friendly version of the idea so that it could fit within multiple game worlds without requiring a DM to pour over a wall of text lol.

I've heard good things about GURPS before, but thanks for the heads up. Also I'm glad to see such an educated person on the subject taking a look :). Hopefully it's not insulting to the nature of such things how I've attempted to design the class, I just thought it would be best to tackle the "Fun to play" aspect first and worry about the real world implications secondly.

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