"Twisting into something hideous. It's the physical embodiment of what he feels within. He is obsessed, fixated on the contradiction of gods and mortals. If mortals have capacity for wisdom, why do they show off in fame? If gods see their actions as wicked, why do they tolerate it and forgive? How could gods and mortals seem so different and so alike? What is the point of it all? Zamasu seeks beauty. Yet, look at his body. It's distorted by hatred and rage. I wonder, is that really the result he craved? A broken, misshapen god alone in a vacant cosmos. How fulfilled will he be then?"
"Half-Corrupted" is an "ugly form" utilized by Fused Zamasu in the anime, turning him into a mutated state. In this form, Fused Zamasu is known as "Grotesque" Fused Zamasu.
In the anime, the state is attained due to receiving extensive damage and further powering up through the Light of Divine Justice. In the manga, the state is attained when the Potara Fusion ran out, but due to Future Zamasu and Goku Black being one and the same, their synergy caused them to reject the fission.
Usage and Power
Fused Zamasu is created from the fusion of Future Zamasu, who is immortal, and Goku Black, who isn't immortal and is far stronger than Future Zamasu. Because of this Fused Zamasu was not completely immortal and became half corrupted.
After having half of his body disfigured by Goku's God Kamehameha, Fused Zamasu calls upon the Light of Divine Justice to severely injure his arm - causing his arm to become larger, much more muscular and creating more scarred flesh - but also increased Fused Zamasu's power. His aura also changed into a fusion of Future Zamasu's purple aura on the inside and the dark red outer part of Super Saiyan Rosé Goku Black's aura.
This increase allowed Fused Zamasu to power up even further, which forced Goku and Vegeta to fuse into Vegito to even the odds. During his fight with Vegito, Fused Zamasu's body becomes more and more unstable as his power and anger increases. Eventually, Fused Zamasu utilizes Gigantification in the climax of his fight with Vegito.
In the manga, Infinite Zamasu's initial form is a Grotesque state where he is half Goku Black and half Future Zamasu, similar in concept to Fused Zamasu's anime only Half-Corrupted form.
Video Game Appearances
This Half-Corrupted form of Zamasu debuts in Dokkan Battle.
It later appears in Xenoverse 2's Dragon Ball Super Pack 4 DLC. Fused Zamasu in this form appears only in the story mode. It appears in two cutscenes, one where Vegito fights Fused Zamasu, and a cinematic cutscene where Vegito eventually defuses and then is defeated by Super Saiyan Anger Future Trunks' Final Hope Slash. In the Extra Pack 4 DLC, Fused Zamasu in this form appears as a playable character for raid boss matches.