[Arts] Sky Striking Grenade

* Final Damage of Black Horn Bow and White Horn Bow decreases by 75%

* When casting Black, White Horn Bow, unguided projectiles are fired at the target location and deals AoE damage at 40 range around the target

* AoE Attack Ratio of Black, White Horn Bow changed to 5

* Flight speed of Black and White Bow projectiles decreases

	Skill Name	Class
	Black Horn Bow
	White Horn Bow

Visual