The Deathly Hallows are all very powerful and potent artifacts on their own: a perfect invisibility cloak, the most powerful wand, and a stone that can recall shadows of lost loved ones. That is good and wonderful and makes one feel all warm inside (doesn't it?). But when mentioned together, the Deathly Hallows are often referred to as having the ability to make one "the master of Death".
While it could be stated that calling someone possessing all three Deathly Hallows "the master of Death" is simply to indicate that that person has three very powerful items at their disposal, if all three items were made by a trio of brothers then it is not beyond possibility that they may have included an additive bonus to the artifacts that only reveals itself when all three are brought together by one person.
Therefore, is there information either way to indicate if the three Deathly Hallows did have additional powers when used together as a set?