Vortex:
Vortex of confusion... One piece... Mysterious power...
Aerial Cleft... This place is a battlefield where one can enter through a small vortex hall, which releases mysterious energy. When you register, you can choose between red and blue teams. When a number of members for each team is over 9, the battle field automatically becomes active.
You must be able to transform into a Flying Transformed Object to move onto the battlefield. Members of each team acquire points by attacking the other team's PCs or destroying a compressor located on the battlefield. If energy is focused on one member, they become a concentrated attack target (CAT). When you drop that target, you can gain bonus points.
The winning team obtains emery pieces and star stones. Combine them with seed energy and you can change them into powerful attribute crystals using a created converter.