You forgot to change the chakra nature again O_OMisaka molds the chakra into water. Then, after she molds her chakra into water, she focuses and using her chakra control she uses the chakra she just molded in an attempt to cause an eruption of water to come out of the pond that is nearby. She also concentrates so that it is strong enough to knock the wind out of her.
Remember:
- Mold your chakra into the water.
- Change your chakra nature to water.
- Use chakra control to uplift the water, pushing you upwards.