Icewalker

is a sub-skill that, as level increases, lowers the chances of the player slipping on ice-covered surfaces. It can be leveled up by walking on ice. The maximum level is level 6, and gives a very high resistance (but not immunity) to slipping. Increasing this sub-skill to the maximum makes the Marching Sword significantly more viable, as there is a lower chance of slipping on the ice the sword's ability creates.