In Earthdawn Third Edition, Durability is a Talent Option. In this campaign, when a PC reaches 2nd Circle in their Discipline, they receive Durability as a Rank 0 Talent [it’s neither a Discipline or a Talent Option]. Since only one Talent Option can be picked per Circle, this allows all PCs a better chance of surviving and will not require the PC to spend a Talent Option slot at 2nd Circle on Durability.
Unique to each Discipline.
The adept’s ability to take damage increases by improving the Durability talent specific to his Discipline. Each Rank permanently increases his Death and Unconsciousness Ratings by the values separated by a slash and shown in brackets [ ] in the Discipline description. The number to the left of the slash is the increase to the adept’s Death Rating, per Rank. The number to the right of the slash is the increase to the adept’s Unconsciousness Rating, per Rank.
Evantra the Archer improves his Durability talent to Rank 3. According to the Archer Discipline description, the Durability talent is shown as [6/5]—each Rank adds +6 to the adept’s Death Rating and +5 to his Unconsciousness Rating. At Rank 3, Evantra will have added a total of +18 to his original Death Rating and +15 to his original Unconsciousness Rating.