Final Flicker

Final Flicker is one of 's support s in Xenoblade Chronicles. It allows Dunban to sacrifice a fifth of his max HP (rounded down) to fill half of his talent gauge.

Overview
Unlike with Shulk's Battle Soul, Dunban generally does not find himself in situations where he suddenly needs access to his talent art right away. But 20% of Dunban's max HP is not too great a loss compared to suddenly gaining ten auto-attacks worth of talent gauge. It's probably not something Dunban will use whenever it's up, but if it's safe to lose the health, it's a potentially huge damage investment.