Definitions for "Swiftness"
The quality or state of being swift; speed; quickness; celerity; velocity; rapidity; as, the swiftness of a bird; the swiftness of a stream; swiftness of descent in a falling body; swiftness of thought, etc.
a rate (usually rapid) at which something happens; "the project advanced with gratifying speed"
Keywords:  attack, increase, rate
30% Attack Rate increase