Ice Sword

The Ice Sword is a treasure found in Pikmin 4. It is actually a blue sword-shaped.

Engulfed Castle
There is an Ice Sword lying in a puddle of water near the southwestern corner of sublevel 1 of the Engulfed Castle, stabbing a Juicy Gaggle. It is guarded by a Fiery Blowhog and a Pyroclasmic Slooch, which should be defeated before attempting to collect it. To collect this treasure, you must throw 1 Pikmin at it, which will make it detach from the Juicy Gaggle.

Giant's Hearth
There is an Ice Sword on an exposed brick at the southwestern corner of the outside of the grill, located near the center of the overworld. To collect this treasure, you must scale the platforming section on the adjacent wall with some jumps, and throw 1 Pikmin at it.

There is also an Ice Sword on a plastic ledge on top of the grill, at its center. To collect this treasure, you must throw 1 Yellow Pikmin or Winged Pikmin at it, or knock it down with a rush from Oatchi and throw 1 Pikmin at it.