The Death Dragon pepper is a cross between the Death Spiral and Dragon's Breath peppers, and is known for being extremely hot: 
Heat level
Death Dragon peppers can have a Scoville rating of over 2 million SHU, making them very hot. The exact heat level of each pepper can vary depending on growing conditions and care. 
Appearance
Death Dragon peppers can start off soft and green, and change to orange or blood-orange. They can vary in shape, with some taking on a barrel shape and others growing upwards. 
Flavor
Some say Death Dragon peppers have a sweeter-hot flavor. 
Side effects
Eating a Death Dragon pepper can cause mouth burning and numbness, and in rare cases, vomiting and headaches. 
Growing
Death Dragon peppers need well-draining soil, full sun, and average moisture. They can be started indoors at least six weeks before planting out, and should be transplanted when they are 8 inches tall.