A high-speed neural interface that temporarily accelerates muscle response, allowing for rapid, multi-attack bursts in close combat
If you attack a second time (and potentially third time) in a combat round, the penalty to the extra attack is lowered by 10 (standard 50, 100 etc).
For each 15 success rate, the penalty is lowered by an extra 10.
For each extra AP spend initially, the duration is +1 round.