Only a few jujutsu sorcerers have shown off their Domain Expansions so far in Jujutsu Kaisen. Only the best sorcerers can generate enough cursed energy to create one. However, the ones fans have seen so far have been pretty mindblowing. Each Domain Expansion reflects the sorcerer's innate cursed technique. Many manifest with absolutely stunning visuals.
Manga spoilers ahead!
Gojo is the strongest jujutsu sorcerer on the planet. As the first in his family to inherit both the Limitless and Six Eyes techniques in 400 years, Gojo's been granted a roster of flashy techniques and immeasurable amounts of cursed energy.
Gojo's Domain Expansion, Unlimited Void, inundates his target with an unprecedented stream of information. Their senses are picking up and feeling everything, but also absolutely nothing at all. It's not necessarily a combative Domain Expansion, but it works as an excellent tranquilizer, rendering Gojo's opponents stunned and unable to move or function.