"Now you will know the horror, Frieza!"
Now I'm Mad! (オレは怒ったぞ！ Ore wa okotta zo!) is a Power Up technique used by Goku in his Super Saiyan and Super Saiyan Blue forms. The name for this technique is based on the dialogue Goku used against Frieza.
Super Saiyan Goku shouts "I'm Angry" as he powers up. The technique causes him to be at full power with his attributes increased for a short period of time. In addition to powering up the user, they will also injure the opponent if he or she is in close proximity by simply using the ability.
In Dragon Ball Super, when Goku Black informs Goku of how he stole Goku's body and Chi-Chi and Goten in his timeline, caused Goku's anger to power him up. The power up allowed Super Saiyan Blue Goku to overpower both Goku Black and Future Zamasu, until Black used his own rage to power-up and defeat Goku with Divine Lasso.
Video Game Appearances
Now I'm Mad! was named and appears as a Blast 1 used by Goku (Mid) in his Super Saiyan form in Dragon Ball Z: Budokai Tenkaichi 3; it uses three Blast Gauges. The technique reappears as one of Super Saiyan Goku's Super Attacks in the Raging Blast series, under the name Now I'm Angry!. The move reappears as an equipable Z-Soul in Dragon Ball Xenoverse. The Z-Soul raises health by two stages and grants free skill use for a short time whenever an ally is knocked out. Super Saiyan Goku also uses it in cutscenes after transforming in Age 762 in both Dragon Ball Xenoverse and Dragon Ball Xenoverse 2.