Grim Focus

Grim Focus is a Nightblade Class skill, found in the Assassination Skill Line.

Grim Focus
1890 Target: Self
When Slotted on either bar, you focus with lethal intent, causing your Light and Heavy Attacks to generate a stack of Grim Focus, increasing your Weapon and Spell Damage by 60 up to 5 times.  Fully-charged Heavy Attacks grant two stacks. When at full stacks, you can consume them all to fire a spectral arrow to deal 4182 Magic Damage, and heal for 33% of the damage dealt if you are within melee range.

Grim Focus is a Nightblade base skill. Its two morphs are Relentless Focus and Merciless Resolve.