The Imperfect Instinct Kamehameha is effectively a Kamehameha wave performed with much more energy output and force than even a God Kamehameha. Much like its original version, it can be manipulated to the user's advantage.
Usage and Power
Goku used this attack to defeat Kefla during the Tournament of Power after she unleashed a more powerful version of the Blaster Meteor. Being in use of the Ultra Instinct -Sign- form allowed Goku to dodge all of the blasts while charging the Imperfect Instinct, forcing Kefla into using one final attack to try and take Goku out, but Goku leaped higher and slid the Kamehameha energy sphere on the attack, bringing him close enough to unleash the Kamehameha on Kefla, which was strong enough to send her flying off the stage, eliminating her (and by effect, Caulifla and Kale together).
Later during the Tournament, Goku uses Imperfect Instinct Kamehameha in his battle against Jiren, although it is negated by a concentrated Power Impact, enabling Jiren to blast Goku away but he managed to use the energy of his Kamehameha as an energy shield to reduce the strength of Jiren's blast.
Another variant allows the user to quickly convert the offensive energy in the blast to defensive energy to shield oneself.
- Supreme Kamehameha: A more powerful version of the Imperfect Instinct Kamehameha.