

The Sicaran Arcus Tank Tertius Bellum (Third War) was assembled from the remains of three destroyed vehicles in the aftermath of the Betrayal. Its machine-spirit is temperamental, and its armor plates still carry scorch patterns from the surface of Calth itself. The 121st keeps it in the line not for sentiment but because despite its quirks, it always does what needs to be done. When command needs a target reduced to rubble without delay or ceremony, Tertius Bellum is called forward.
Vehicularis Legionaries
- Commander Pyra Dane (Gunner)
- Specialist Juno Kell (Driver)
Dane and Kell are known for the shortest engagement cycles in the company. They operate on minimal verbal coordination, relying on fixed firing patterns drilled to repetition. Their vehicle logs show fewer rounds expended per target destroyed than any other Arcus in the fleet. Their peers call them “the accountants.”
Wargear
- Arcus Missile Launcher
- Arcus Missiles
- Skyspear Missiles
- Pyrax Missiles
- Neutron-Flux Missiles
- Lascannon x 2
- Heavy Bolter x 1
- Smoke Launchers