To Alloy is to fuse disparate materials together to become parts of a greater whole. In its native state, this is a pool of energy that can be used to fuse disparate parts into a cohesive whole with only a touch. These Alloys are at the very least equal to the sums of their parts. While the pool itself is finite, the energy can be returned by un-fusing Alloys back into their component parts. The pool itself grows slowly over time, but fusing disparate and interesting combinations produces faster development.
You must touch components within a short time frame in order to Alloy them together.
When fusing objects, you are able to influence the outcome, if not completely control it. Fusing a mystical sword and shield, for instance, may allow you to dictate the preferred form it takes, the shape of the enchantment that stays, or the way it manifests, even if it is not completely controlled.
Another avenue of Alloying is in the fusing of people. The alloyed individuals are, as with the object, a new entity that is greater than the sum of its parts. The individuals that made up the new entity are influenced in personality from their components, but remain with access to their memories and powers. As with fusing objects you can guide the form this alloy takes, and what traits are more strongly expressed from each component. This does not give you control over the new entity. You may fuse people and objects together, but the results are largely unpredictable, and can become unstable easily if the Alloying is not directed carefully.
The ultimate expression of Alloying people is by fusing yourself with others, in which case a few differences are notable. As you perform the fusion, you can guide it with greater detail, allowing further control to the outlook and personality of the fusion, however, any other components cannot be disregarded, and will always have at least subconscious impact over the fused entity.
The final aspect of Alloying is the fusing of different powers and effects. With it, one can fuse even entirely scientific phenomena and magical enchantment into singular results. The outcome is likely to provide unexpected results depending on the separation in source of these powers, but are guaranteed to at least be interesting and useful in different ways. Powers that come from similar sources are likely to Alloy together better, providing minor additions and mutations in comparison to alloys from sources alien to each other.
Unalloying returns all energy expended fusing the components and returns the components to the state they existed in before alloying. You must touch the Alloy to unfuse its components. When un-alloying people, they will share memories of the time alloyed to a similar degree to which they had influence over the alloyed entity.