As Far As The Eye

Traits are unlocked on the end game screen after completing a successful Quick Game scenario, wherein the condition to unlock the trait is met.

The trait Minus is unlocked by reaching the Eye without any pupil taking damage. Negative traits such as Puny can nullify this, so take care on which traits you take with you or pick up from new pupils on the journey. Usage of the Council to nullify minor vagaries is suggested, as well as knowledge of the Major Vagaries which can cause damage at their start (such as Hailstorm). The list of Vagaries, and what they can do, is listed here:
https://as-far-as-the-eye.fandom.com/wiki/Vagaries