Demon Spiral Fist is an offensive technique used by Shula.
Shula concentrates Ki into his arm, creating a large coil of energy that spirals around his arm. Then, Shula either rushes at the opponent and hits them with the charged attack, or blasts them from a distance with the spiral, which can causes huge damage. The attack can also be used to nullify Ki attacks like Goku's Kamehameha.
Shula used this technique multiple times against Goku during their fight, mostly to knock Goku back or stun him. Shula also used it to protect himself from Goku's Kamehameha.