Minecraft wiki entry for Spawner_traps, associated text: One way to make a blaze farm is to box in the spawner, so that the blazes can't fly away. Leave a space at the blazes foot level and stand so that your eye level is at that space. That way the blazes can't hit you (mostly), but you can hit them. This is also a pretty good experience farm since each blaze drops twice as much xp as other mobs with its health. Be warned, however, that sometimes blazes will spawn outside the box so it is advised that one box themselves in as well.