It can make having low HP less of a disadvantageous position. Its effect is stackable, and can be used in conjunction with other attack-boosting medals to deal devastating damage. It could be paired with Hard Charge and Life Cast to intentionally get an ally's HP low so that they may take advantage of this medal's effect.
How to Acquire
There are 2 Last Attack medals available. It can be found during Chapter 3 at the earliest, after gaining the Beemerang Halt field skill from the Golden Festival and completing the Bounty: Devourer quest.