Defensive Roll
From Talus Wiki
Type of Feat: Class
Prerequisite: Rogue 10, Shadowdancer 5
Specifics: If the character is struck by a potentially lethal blow, he makes a Reflex saving throw (DC = damage dealt). If successful, he takes only half damage from the blow.
Use: Automatic, but limited to 1x/day. Flat footed characters cannot make a defensive roll.