Amethyst Sonar

Amethyst sonar: The user sends sound waves off of amethyst shards over an area, any invisible enemies in this area are noticed by the user. The radius for this technique increases every round and targets in this radius have disadvantage on saves against techniques from the user. Rank: E. Style: Kekkei Genkai. Chakra cost: 5 per round. Range: 30ft radius, +10ft per round. Save: None. Damage: None. Focus: Yes. Requirements: One free hand. Enhancement: Doubled radius. Minor Action