When you take the Attack action while your ValdaSpire24Extras is active, you can perform a Grand Finale. Until the end of your turn, any attack you make that hits becomes a Critical Hit, and you can make two additional attacks as a Bonus Action. At the end of your turn, your ValdaSpire24Extras ends.
You can't use this feature on the first round of combat, and once you use this feature, you can't use it again until you finish a Long Rest. You can also restore your use of it by expending two uses of your ValdaSpire24Extras (no action required).