The main feature of the black spear was that it could never miss. It wasn't a matter of its speed or accuracy, but rather that the black spear would keep changing its trajectory until the target was struck.
The Glare of Final Determination was a somewhat unique case, as it was one of two abilities shared with Silvana, but it was also a dark version of another ability - Future of the Past.
So, the black spear changed, just like the white spears, but they weren't as significant as those of the white spears.
The black spear simply became better, across the board.
Previously, the black spear was always a single entity. If it couldn't hit its target, it would gradually increase its speed, but even if that proved insufficient, the black spear would begin to teleport along a line with the target.
This continued until the black spear reached its limit, which was reflected by the crimson energy resembling a flame emanating from the tip and the back.
