Substantiation for Lightweavers

[Trusk'our he/him]

I was sorely disappointed that there was not a talent for Substantiation. It's by far my favorite Lightweaving ability.

Now, I realize that if it's used it would probably count as a pretty powerful ability, so there would need to be some stricter limitations on its use.

The only times I recall seeing it is when Shallan is in the battle for Thaylenah in which Dalinar's Perpendicularity fuels her and bridges the Realms, in the CR to stab Abidi and shoot at some Fused. Probably safe to allow Substantiation when such large quantities of Investiture are nearby, such as when near or in a Perpendicularity, around a huge stack of infused spheres, in the SR, or right after swearing a Radiant Oath.

To use it reliably, you'd need an advanced (3rd Oath/Truth requirement minimum, I'm thinking) talent and should probably be limited to a single Substantiation at a time (except perhaps for the previous extraordinary circumstances), then probably spend a decent chunk of Investiture to get it going compared to most Surgebinding- say, 3 Investiture it initiate it?

Mechanically, you could create a Lightweaving capable of interacting with the physical world, using a general statblock you can apply that will increase in power as you and your Lightweaving skill increase. 

 

Other thoughts to add?

[Erremin]

There is one, it's called "Physical Illusion" and it's in the Lightweaver Radiant Path. It's not in the Illumination path because it's not an ability truthwatchers get, only lightweavers due to their combined surges of illumination and transformation

[Trusk'our he/him]

8 hours ago, Erremin said:

There is one, it's called "Physical Illusion" and it's in the Lightweaver Radiant Path. It's not in the Illumination path because it's not an ability truthwatchers get, only lightweavers due to their combined surges of illumination and transformation

Upon further consideration- 

[Qianweilian He/him]

On 1/13/2026 at 11:21 AM, Trusk'our said:

Upon further consideration- 

You're not illiterate, the doc of rules is not incredibly clear on things. Many things are obscure and not easy to find. I’d love a cosmererpg wiki with links, tooltips, and access to information.

[Trusk'our he/him]

42 minutes ago, Qianweilian said:

You're not illiterate, the doc of rules is not incredibly clear on things. Many things are obscure and not easy to find. I’d love a cosmererpg wiki with links, tooltips, and access to information.

Thanks 

But yeah, the book is structured in such a way that it can be confusing at times (and occasionally contradicts itself, albeit it's really only with the lore).

[Qianweilian He/him]

I suspect it’s only going to get worse with the Mistborn and later RPGs, when more talents, skills, and rules are added.