If you don't want to risk your life to get your cave cherax, you don't have to do it in Kuftal Tunnel (Hate this place).
Enter Quicksand Caves through Eastern Altepa Desert, G-9, east of Outpost. When go downstairs, follow West till you get to D-9. Go south and find a vortex down in E-11. Fall down and follow tunnel till first left. Go down first left and you'll get to the underground pond where you fight Kraken NMs for Sandy 8 mission.
Use Meatballs and Lu Shang's.
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