How do you get a creeper head?

To obtain a creeper head in minecraft, you need to make a creeper explode while it is being killed by a charged creeper. First, create a charged creeper by getting a regular creeper struck by lightning. Then, lure the charged creeper near another creeper and let it explode, which will drop the creeper head. Alternatively, you can also find creeper heads in loot chests or as a reward for specific advancements.