Minecraft wiki entry for Achievement_guide, associated text: Kill a blaze and collect its dropped blaze rod. An easy way to do this is to find a nether fortress, then find a blaze spawner. Armed with over 7 snowballs, attack the blaze from range. Blazes don’t always drop their rods so you might have to try a few times. A Potion of Fire Resistance is useful. Upon the blaze's death, collect the rod.