Reward: That construct permanently gains +1 Toughness. This sub-plot can grant this bonus only once per fighter, across the whole campaign.
The Cult does not bury its dead — it rebuilds them, again and again, until the machine becomes something greater than the sum of its repaired parts.
When a single CONSTRUCT fighter has been fielded in five consecutive campaign battles without ever being permanently lost — repaired and returned each time it fell — the Omnissiah has plainly marked it for endurance. That construct permanently gains +1 Toughness. A given fighter can be granted this bonus only once across the whole campaign.