Does the Disruption special weapon property activate on every hit?

[darth_borehd]

A brawler wants to make magical handwraps with Disruption and use his flurry of blows against undead. Do the undead have to roll the Save every he hits them or only once for every flurry?

[Diego Rossi]

Yes. There is no limit to the number of times the power can be activated in a round.