The striker celebrated in style in front of Gunners fans after retrieving a bag with the item inside.
The Gabon international kicked things off inside five minutes when he tapped home Aaron Ramsey’s cutback.
Ainsley Maitland-Niles then doubled the lead before half-time.
And Aubameyang got his second of the night when Sead Kolasnic put the ball on a plate for the forward.
Inside was a mask of the Marvel character Black Panther, which Aubayemang put on before running to the cameras.
Aubameyang on his Black Panther mask celebration: “I needed a mask that would represent me. It is a Black Panther & in Africa, in Gabon we call the national team the Panther of Gabon. It represents me.”