FIG. 1 is a perspective view of a blade showing my new design;
FIG. 2 is a front view thereof, a rear view being identical thereto;
FIG. 3 is a right side view thereof, a left side view being identical thereto;
FIG. 4 is a top view thereof; and,
FIG. 5 is a bottom view thereof.
The ornamental design for a blade, as shown and described.