Grants an ability which when activated automatically carries over up to 10 unused AP to the next turn.
For example: You have a 12 AP assault rifle in your first slot, fire a burst for 36 AP, keep those 14 AP for the next turn of which 10 will carry over granting you a total of 60 AP in the next round, allowing you to fire twice with your second slot 30 AP sniper.
Or:
You fire twice with a 24 AP sniper for 48 AP total, carry 2 AP over to the next round - having 52 AP total. You can now take Blitz/adrenaline shot to raise your AP to 72 and fire the sniper 3 times for 24 AP each.
Reqirements could be: Level 10, Intelligence 8 with a cooldown of 5 rounds. High INT as a requrement is interesting because so far it's rather underused when it comes to feat requirements and it fits well for a clever "tactician" who likes to plan one steap ahead.