I claim the ornamental design for a Tai Chi sword brush, substantially as shown and described.
FIG. 1 is a lateral view of the Tai Chi sword brush showing an elongated sword-shaped body (1) comprising a hand grip blade (2), a feather-tail string (3) and a pointed cylindrical artist's brush (4).
FIG. 2 is a top view of the Tai Chi sword brush showing the feather-tail string (3) and hand grip blade (2); and,
FIG. 3 is a bottom view of the Tai Chi sword brush showing the pointed cylindrical artist's brush (4) and hand grip blade (2).