http://forums.carrionfields.com/dc/dcboard.php?az=show_mesg&forum=6&topic_id=19207&mesg_id=19222&page=
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Relatively cryptic/not clear, he could have meant it prevents their attacking as much as they would if you don't have Fluid. Fluid to me seems like a totally ####-tier pick on any warrior dependent on returning damage via concealed/riposte/swiftstrike and a totally great power boost on any other warrior if it was given as a 3rd legacy. I can't imagine picking it as one of my two coded legacies, on any warrior, though. Maybe a helf with fluid + space would be cool... but if you were going to do that, why not just do an elf with stsf + space