If it's not animated, then something done fucked up.
Guess what game I've been playing. The stream was titled "There should be an osprey mask," so once I finished the second one, I decided to make that a reality! I guess if it had any effect, it'd be faster executions. Doesn't make punches/doors/throws outright lethal like Tony/Don Juan/Jake respectively, just makes them more effective for a slightly different play style.
I'm aware the gradient of the background is supposed to be smoother, but keeping it that way caused the GIF to be over 6 megs large. Reducing the colors without error diffusion on the mask itself required the gradient to be sacrificed to the compression gods.
And yes, the shadow's rotation is supposed to be disjointed.