Use it as you wish, I don't have net to upload the other border versions, just do what I do with Icons, save the JPEG that the gallery provides if you like an icon and the convert it with the button manager (like that you save your self that .rar and those extraction folders)
Set it as blizz
It is the mortal shot icon rescaled for it to look good (so that you can fully appreciate the skull).
Black Arrows (redone):
Stuns units and structures for 2 seconds. (blackens them, looks cool).
Causes big units and heroes to be slowed, reducing their movement speed by 50% and their attack speed by 25% for 2 seconds.
Units that die under the effect of Black Arrows spawn Dark Minions (now can also spawn Flying Dark Minions when killing aerial targets).
Does also spawn Dark Minions when killing heroes. (it is triggered now, makes targets explode on death, checks if they can be raised).