Double Galick Gun
From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Directory: Techniques → Offensive techniques → Ki → Energy waves
The Double Galick Gun (ダブル ギャリック 砲, Dabura Gyarikku Hō) is a two-handed double version of the Galick Gun and used by Vegeta. Vegeta pulls his hands back to his sides and charges a Galick Gun in each hand. He then fires them forward so that they merge into one large Galick Gun wave, inflicting a large amount of damage.
Vegeta used this attack in the battle against Second Form Freeza. After Freeza attacked Son Gohan, Vegeta fired an energy blast at Freeza and followed it with the Double Galick Gun, creating a huge explosion. However, as the smoke cleared, Freeza was unaffected by the attack much to Vegeta's shock.