So, it's time for a tangent about Accretion and magic systems. Probably none of this is relevant to Hunger since he has a set of ridiculous-tier artifacts already.
Vertex and Accretion would make quite a powerful twice-great combination. Accretion can be "leveled up" by working on the craftsmanship of his artifacts, which naturally syngergizes with Vertices needing to be crafted. Accretion acting as a form of symbiosis with both artifacts and wielder becoming greater then the some of their parts could allow the hypothetical twice-great to elevate their vertices to higher tiers of power with less lifespan sacrifice required. The natural reality-warping of Rank would also protect the bonded Vertices from being destroyed, one of their downsides.
On the topic of Surgecraft... I wonder if an Accretion user could make their Imaginary Element their bonded Accretion Artifact? We know from the Muscle Wizard build back in the day that a person could designate their body as an Accretion Artifact - however, that was with the effect of Intensify, a Cursebearer Lesser Remittance! With Accretion being all about accumulating shared experience and legend to enforce mythic archetypes of some sort. I imagine "Wielder of the unique personal element X" could be a valid archetype, and thus a Surge element could qualify as an Accretion Artifact, especially if it was the most distinctive thing about the user, but it's unclear exactly what the limits and requirements of Accretion are. Exactly what qualifies as an "object" for the purposes of Accretion? Can a signature ability of some sort be it? A special martial art, or a specific and distinct magical ability a la an element surge? I seem to remember Rihaku saying something about a signature skill being a valid target for Accretion, which would imply that abilities could be bonded artifacts, which then leads into "Yes, you can probably make your Imaginary Element an Accretion bond."
Another thing, we know for a fact that someone with both Soul Evocation and Accretion can directly train their rank. That implies some level of synergy between the two, perhaps an awakened Soul Evocation makes a person more aware of their "Pressure," the effect their Rank is imposing on reality. Maybe that then allows them to expand the power of their rank with training, like exercising a muscle. Now, tying this in with the above, if an Imaginary Element could be a Accretion Bond, could a Soul Evocation? If so, SE+Accretion would be really synergistic - the Accretion half benefits from being able to train rank, while the SE is empowered by the Accretion bond.
Where is this all going? Aside from cool speculation, Rihaku voiced a question waaaaaaaay back in the initial Magic System vote about how a Thrice Great with the systems of Accretion, Soul Evocation, and Battle Magic would fare. I would posit that a Thrice Great of Accretion, Soul Evocation, and Battle Magic would actually be really good, provided that Accretion can by applied to signature abilities. If so, the hypothetical Thrice Great could designate their Soul Evocation and two "Signature Spells" from Battle Magic as Accretion Bonds, and with the ability to raise their own rank via SE they would be able to grow quite powerful even without taking huge risks to gain rank from! The rising rank would propel the Soul Evocation upwards, while the two Signature Battle Magic spells would become very powerful, if very specific, tools that then could be used to defeat extremely powerful opponents, causing Rank to go up, again. It's actually quite synergistic over all, although it would require a very good Soul Evocation and high creativity with BM spells to reach its full potential.
-ImperatorV, answering questions from hundreds of pages ago.