「CounterSide SEA」Dimension Trimming Volcano Stage 7 (Auto Mode) 

Tips :
0:11 : Stage 1
Bring your Sniper Attacker like Xiao Lin for the Safe Range against Enemies's Attack. Orca is also Helpful due to her bonus DMG to C.O.
1:02 : Stage 2
The Boss is Quite Tanky and hard to Kill despite it doesn't have a Special Gimmick, Bring your best Ground Tanker. An Air Units Attacker is Recommended. Also the boss gets Weaker when there are more Units on the Field, so i Recommend using Blue Bridge MK.2 Ship.
2:40 : Stage 3
This one needs you to Kill the Boss ASAP before it unleashed it's Ultimate Attack, or else it'll Destroy your Ship Instantly. Bring your Strongest Anti-Defender DMG Units to Defeat the Boss Faster. Recommend using a Low Cost Unit, since this stage's DP Recovery is quite Slow.
3:30 The Gears Info
BGM :
- Endure Grief
- Dreaming (The Collected Ys Music of Ancient and Modern Times)