Ser Arthur Dayne

Vigilance
The Greatest Swordsman—Set Arthur Dayne can
block an additional 3 creatures each combat. For each creature that blocks Sea Arthur Dayne or is blocked
by him, he gets +X/-1, where X is equal to his
power.
"I learned from Ser Arthur Dayne, the Sword of the Morning, who could have slain all five of you with
his left hand while he was taking a piss with the
right."
—Jaime Lannister