Burning Creeper

A burning Creeper is found in the Nether. It shoots fireballs creates Lava/Magma and explodes with Fire or Lava surrounding an in the explosion site. This is the hardest Creeper to kill and the most deadly. If a Creeper is in a fire Lava or hit by a Fire Aspect their is a 30 percent chance he will become a Burning Creeper. They could Natrually spawn in the Nether as well. He will be summed during some Boss Fights like the one with the Devil or Herobrine or even Scourge.

Farming
Farming Burning Creepers are recommend to be done by getting them in the Farm in the Nether and get them into the Overworld to kill them. Other than that hvee pistons to get them into the Portal and Pistons to push them in and out of Lava. Then use a Redstone system to use Water so it could Low towards an accessible area to the Player to collect GunPowder, Flint and Steel, and a Lava Bucket. If they are Charged Burning Creepers they will drop a Lightning Rod as well. You get 7 xp for a normal and 24 for a Charged.