Killer Driller Attack is a technique used by the Super Mega Cannon Sigma.
While calling the name of the attack, as it moves forward, Super Mega Cannon Sigma changes its head into a drill able to tear apart everything that it hits.
Super Mega Cannon Sigma uses this attack against Goku, who is still able to stop it by grabbing the tip of the drill and gripping it until it stops.
Video Game Appearances
The attack was called Sigma Drill Attack in Dragon Ball Z: Dokkan Battle, where it appears as Super Sigma Form 3's Super Attack.