Using a pen of pure materials, one may invoke the Foundation. The purer the materials used, the better, both for the pen and the project undertaken with the pen.

The first step is acquiring the pen. The second is acquiring the materials. The third step is always the checking of the materials. A good craftsman always checks his pen and materials before beginning work. The fourth step is getting organized, as one would normally do for a project, and the fifth step is to imagine what one wishes to craft.

Then, one must begin work immediately. If the project is big, then resting is allowed, but other than stopping for natural breaks, any distraction will only flaw the process. One must work single-mindedly upon the project until completion, and then, if one has been true and used strong materials, the power of Foundation will resonate with the results.

A pen used in such a process will gain certain properties, giving bonuses to similar work in the future. A pen used in writing poetry will have +1 poetry from then on, in writing figures +1 to mathematics, etc. All such pens will, if used against morags or hexars, have a further +3/+3 vs. those creatures. The bonuses to crafting continue the more the pen is used, maxing out at +9. The bonus against destroyers will never go above +3/+3.

The more things made with the pen after that, especially of pure materials, the stronger the pen will become. In game terms, every project will add points to the pen. A complicated project seen through will max out at +6 on its own. If it is done entirely with pure materials, a further +3 will be added. These are simply a way of keeping score, and not a reflection of the pen's bonuses (which max out at +9). At 100 points, the pen transforms.

However, because of the intensity of the practice, if one keeps working with the pen over and over again, they risk burning out the pen or themselves. Rest periods between projects depend upon the complexity of the previous project and the nature of the user, anywhere between a week to a century. Because of the power of the Foundation, those more attuned to it (shemir, aldar) must rest longer between projects, because it affects them more strongly. Those more opposed to it (trolls) must also rest longer between projects, because it harms them. Those with a moderate distance from it (muses, for instance) are best suited to recovery.

A transformed pen, called Aedificarium Stylus, becomes made of raw Foundational energy. It will be useful for one more project, for which it will, in game terms, simply be narrated by the user (within reason). After this final project, the Aedificarium Stylus will be merge with the user, giving them a permanent skill boost.