Nerves may have been jangling among the home support when the sides went in level at the break after Dortmund, protecting a 1-0 lead following the first leg of this third qualifying round tie, had missed a host of chances.
But they found the right combination almost immediately after the break at Signal Iduna Park - Marco Reus finishing off a tremendous sweeping move before Pierre-Emerick Aubameyang neatly scored a second on the end of a fantastic Ilkay Gundogan assist.
Mkhitaryan then took centre stage in the game's dying embers, thundering home three sensational goals to add heavy gloss to the scoreline and send the hosts into the play-off phase of the competition thanks to a 6-0 aggregate victory.
Despite the nervy first half, Dortmund grew in confidence, their old attacking swagger showing signs of resurfacing after 2014-15's occasional horrors.
