Auras

Aura of Water

• Kill issui in north city, he's located inside the storm on the ocean
  

Aura of Wind

• Go south in west city (the one south of korin's tower, and west of capsule corp) until you can go southeast, and east and north
• press the button, and continue north, stairs, south stairs until you hit the top floor Kill the girl there, and she'll spawn Barbariccia Kill her, and have a chance to loot the Aura of wind
  

Aura of Earth

• Go to the center of southcity (friendship square)
• South until you hit a NSWE room, go all east and follow the path around north northeast, all north, until you find the dirt golem, kill him, and he'll spawn the rock golem, kill him, for a chance to get the aura of earth.