Deep Durability

Prerequisite: Svirfneblin, warden, stone camouflage racial power
Benefit: When you use stone camouflage, you gain 3 additional temporary hit points for each enemy marked by you. The additional temporary hit points per enemy increase to 5 at 11th level and 7 at 21st level.

Published in Into the Unknown: The Dungeon Survival Handbook, page(s) 49.