When you battle the Endsinger at the end of Endwalker, you need to use an LB3 Tank Limit Break to survive her ultimate attack. When you do, the Endsinger goes, "Dynamis!?"

In the reworked Praetorium fight, you get a chance to use an LB3 Limit Break despite being in a 4-man party because, "Your fervent hope shines forth as resplendent Light, granting you strength beyond your limits!"

WoL's deterimination and hope for a better future allowed them to use an LB3 Limit Break in a scenario when it would otherwise be impossible.