the flying potion,would be a potion that lets you fly in survival mode, wich would be really usefull for getting around
because you can fly
it would be crafted by using 3 eye of enders with a potion of swiftness and texture would be sky blue (for obvious reasons)
and it would also make you take no fall damage

this would improve the game because,it would ad a very usefell way of getting around ,into survaival mode also it would make it much easier to explore and build tall structures