Grey Mold

The Grey Mold, also known by its designation REX-100, is a self-replicating, mold-like organism originating from a distal dimension. The release of the Grey Mold at the Kepler Centre for Dimensional Physics triggered the First Incursion as it rapidly spread across Earth, consuming matter.

Behaviourally, the Grey Mold exhibits similarities to species of Earth-based fungi; however, its biology is completely distinct. It is silicon instead of carbon-based. Its defining feature is its ability to rapidly utilise ingested matter for self-replication on a timescale not seen in any Earth lifeforms.