Mallet fist technique

Mallet fist technique: The user expands both their arms before rapidly striking the ground around themselves damaging any in radius. Rank: D. Style: Taijutsu. Chakra cost: 15 per turn. Range: 25ft radius. Save: 10, dex for half damage. Damage: 3d8 bludgeoning. Focus: Yes. Requirements: Body expansion. Enhancement: Doubled range. Minor Action