A Keynome is a powerful cosmic artifact, introduced in Issue 10. It was sought by the Farlander.
In Issue 26, the Vyortovian Forces attempted to capture or destroy two, one under Halcyon High South, the other in the Sepiaverse.
A Keynome was instrumental in keeping hope alive in the Sepiaverse, as engineered by Byron Quill.
As of Issue 27, Concord has replaced his lost shard Sol with the Keynome underneath the school.