What is water? Water is the liquid form of the compound known as H2O. if you can control the H2O then you could control the various forms that water can become, like a gas or solid. if you create a gas from water you could create pressure, creating enough pressure can crush anything even titanium. if you create a solid from water then you can create a bade of H2O thinner then carbon nano-tubes, a bade so thin could literally slice through the molecules in an object, effectively "Phasing" through the object or just slice the object in two. the only thing that can resist the blade would be a crystalline structure. also since water can not be compressed then you and use it to support any object of any wight in mid air.