The shape of water

“The power of water, is it’s ability to take any shape!”

you command a source of water that you can see, to take any shape you want for the duration. You can decide if you want to take all of the source or even just a few drops.

it can be anything from a wall to a living animal.

the size of the thing you create depends on how much water there is in the source thats around you. 
for the duration (which is 1 hour) you can attack with the water as well as control them however you want. If you attack a creature with at least 3 gallons of water, make  ranged spell attack roll against the ac of the target. If you succeed the target take 1d4 cold damage.