Tactical Base Swap

"Don't be in such a hurry to leave. Observation Haki is rather difficult; you may not be able to master it in a short time." As he spoke, Lord Orochimaru took out another scroll, bearing the character "Sound." "This is the Sonar Technique I developed recently. Though it is also A-rank, it can be split into a B-rank technique and a C-rank technique. Kurenai's Sensory Ability still lacks sufficient range. Asuma, study this ninjutsu." Lord Orochimaru handed the Sonar Technique scroll to Asuma.