Minecraft wiki entry for Defeating_a_Nether_fortress, associated text: Actually getting to the blaze spawner is a different issue. While getting there and placing light emitting blocks, you will probably spawn 2-3 blaze spawns with up to 4 blazes each. Drink Fire Resistance, Strength, and Regeneration, pack your best sword, bow, and armor, and fight off the blazes to the best of your ability.