A recently reworked Ability, Blade Storm enables Ninja Ash to take out a number of enemies within sight. On casting, Ash can mark a number of enemies (at the cost of 12 energy per mark, max at base), and on recasting, a smoky spectre of Ash will then teleport about the battlefield taking out marked enemies – this inflicts a large amount of damage, but may not take out tanky enemies. For those not killed by the Ability, there is a guaranteed Bleed proc.
If invisible when casting, the cost of a mark is halved, making Ash’s Abilities somewhat synergistic. At the very least, it’s more efficient to use certain abilities while using one of the others. Blade Storm is impacted by Strength and Range mods, but note that the cost of a death mark does decrease by using Efficiency mods.