Zamasu creates a field of purple energy around his right hand, creating a blade powerful enough to bifurcate a much bigger being, such as a Babarian. It can also be used as a medium to fire Ki Blasts, or as a defensive move (as shown when Future Zamasu used it to block Super Saiyan Blue Goku's punch).
Zamasu first attempts to use this technique on Goku after losing to him in their sparring match when Goku stretches out his hand to help Zamasu get up, but is stopped by Gowasu. He then used the attack on Planet Babari to kill a Babarian attacking him and Gowasu, despite Gowasu telling him not to. Zamasu also used this attack to threaten Zuno, demanding information about the Super Dragon Balls and Goku.
Later, Zamasu killed Gowasu using this attack; however, Whis undid this by rewinding time. Zamasu's second attempt was thwarted when Whis teleported a ki-resistant oven mitt onto his right hand. He later tried to strike Goku with this attack, only for Beerus to catch it with ease. An alternate version of Zamasu, who later would become Goku Black, successfully used this attack to kill Gowasu while he was drinking his tea.
Future Zamasu used this attack several times during his battle with Goku and Future Trunks in the alternate timeline however the technique in the hands of Zamasu has proven to be offensively ineffective against Goku and Future Trunks, who merely swat his hand aside due to the gap in their power.
Due to being Zamasu, Goku Black can use the God Split Cut; notably, he used it to kill Goku, Chi-Chi, and Goten in his old timeline. He later goes on to use an upgraded version of it named Fierce God Slicer.
Fused Zamasu uses the Fierce God Slicer variant of this technique while in his final battle with Future Trunks, only for Trunks to slash through the ki blade and defeat the Potara-fused Villain.
- Fierce God Slicer: An enhanced variant of the technique used by Goku Black.
- Fierce God Slicer (scimitar): A more powerful version of his usual sword form, he uses it in combination with several piercing energy blasts that explode on contact.
- Fierce God Slicer (scythe): An even more powerful version of the Aura Slide technique, attained by Goku Black after he turned his anger into power. It became capable of opening a rift in space and time which could release clones of himself that are as strong as he is.
- Violent Fierce God Slicer (激烈神烈斬) - An amplified version of the Fierce God Slicer. It is Fusion Zamasu's super attack in Super Dragon Ball Heroes. First Zamasu creates a normal Fierce God Slicer, then he turns it into a giant blade, and then he slashes the opponent multiple times.