the pièce de résistance

the best or most important thing in a group or series The pièce de résistance of his act was to make a car vanish on stage.

Name	Pronounced	Usage
LÍGia	-	Portuguese
Allie	['æli]
Mirabella	-	Italian
Zephyrinus	-	Late Roman
Pyrrhos	-	Greek Mythology, Ancient Greek
Osbourne	AHZ-born	English (Rare)