GM Zel Tertius – Frontier World of the Zel System – Ignis Aeternus WH 40K campaign notes

Classification: Unclassified Frontier World
System: Zel System, Drusus Marches, Calixis Sector, Segmentum Obscurus ultima-tectum.com+9calixipedia.fandom.com+9calixipedia.fandom.com+9

Zel Tertius serves as a model colony on the edge of Imperial-controlled space, offering a foothold in the largely untamed Zel System scribd.com.
It forms the third planet of the system—alongside the uncharted Zel Primus and the death world Zel Secundus—supporting the frontier presence of the Imperium tabletopterrain.com+12calixipedia.fandom.com+12wh40k.lexicanum.com+12.

Initial settlements include hydroelectric labs and small hive-complexes, usually built along major rivers, supporting fledgling industry and colonist needs ffg-forum-archive.entropicdreams.com.
Zel Tertius hosts a modest Imperial Guard presence, deployed to maintain control, suppress local threats, and oversee frontier development calixipedia.fandom.com+7calixipedia.fandom.com+7ffg-forum-archive.entropicdreams.com+7.

The planet has recently suffered a mutant outbreak tied to the bio-heretical work of Arch-Heretic Sar Resque.
Biologis labs deep within caverns have been discovered, infested with mutated experiments and corrupted Servitors wh40k.lexicanum.com+6calixipedia.fandom.com+6ffg-forum-archive.entropicdreams.com+6.
Settlements are found abandoned or desecrated, with mutant “Transfigured twins” rumored to oversee dark ceremonies beneath the world’s surface calixipedia.fandom.com+1ffg-forum-archive.entropicdreams.com+1.

Zel Tertius acts as both a gateway and buffer on the frontier of the Drusus Marches.
Development and stability here directly impact nearby systems and the wider exploration edge of the sector scribd.com+8ultima-tectum.com+8calixipedia.fandom.com+8.