After Kandachi performs the necessary hand seals, the Conch King opens its shell and releases a mist that puts the opponent under a genjutsu. In the genjutsu, the Conch King licks the opponent until they're frozen, which results in the opponent being overcome with fear and going into a mental breakdown in a matter of time. The power of the genjutsu was greatly increased by the magnetic forces of the trees surrounding the swamp they were in.

References

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Supplementary +
水遁幻術・霧幻魔牢 +
水遁幻術・霧幻魔牢 +  and Suiton Genjutsu: Mugen Marō +
Suiton Genjutsu: Mugen Marō +
Conch King (null) +  and Kandachi (null) +