From publisher blurb:
Legendary items are those that are picked up by the untested adventurers who eventually become heroes of the ages. Unlike traditional magical items, legendary items grow with the wielder, becoming more advanced as new abilities are unlocked over time. Dreamscarred Press kicks off its new product line, Psionic Items of Legend, with Disruptor, Shield of the Mind Slayer, a crystalline shield used by soulknives.
Within this short book you will find the history of Disruptor, the requirements to attune a character to it, and the abilities of the shield. In addition, the rules of legendary items are detailed.