Grand Void.
This was the sword skill that Keane's Master had perfected over the years.
The first form of this skill was called Splitting Trees. The moment that his thumb pushed the hilt of his sword up, and allowed his blade to peek out of its sheath, trees would be split apart in half.
The Second Form of this sword skill was called Splitting the Land.
When the blade left its sheath, a deep gash, that ran dozens of meters in length and several meters deep, would appear in the ground in front of him.
The Third Form was Splitting The River. With a single, quick slash, the raging water of the river would be cut in half, creating a passage that would allow anyone to traverse it.
The Fourth Form was Splitting a Hill, this attack would effectively slice a hill in half, in any way he'd like to have it cut.