Frieza creates a small energy sphere on his finger in order to intimidate his opponent.
After introducing himself to the Namekians of Moori's village on Namek, Frieza used this technique in order to threaten them. He does not attack them with it as its mere presence is enough to leave the Namekians scared. After intimidating the Namekians, Frieza powers down his Fingertip Ball.
Video Game Appearances
The Fingertip Ball was named in the Dragon Ball Z Collectible Card Game, where it appears as part of the card "Frieza's Fingertip Ball". It cannot be stopped and causes non-Aliens opponents to lose one stage.