Dry SpellG 15

Load up the new Elytra Tutorial World. I found a Sponge in a chest at the coordinates: X: -397, Y: 92, Z: -95. Make sure you use it on water to make it a Wet Sponge, then take that to any furnace and insert it inside along with a wood block or anything that can be used as a fuel source to get this Achievement (you can even use a Bucket of Lava as the fuel source and get the Super Fuel Achievement at the same time). It may be easier to take a furnace along with you to cut down on backtracking.