The user creates a swamp by changing the ground beneath a target into mud, which the target sinks into. The mud is infused with chakra to make it sticky, ensnaring the target and preventing escape. The size and depth of the swamp are determined by the user's skill and the amount of chakra used. It is most effective when used against multiple and/or particularly large targets.
This technique is not restricted to usage on the ground, as it can also be used to capture enemies clinging to ceilings. They sink into it regardless.