The "Blood Ghost Yaki Black" pepper is a superhot pepper cultivar, a cross between the Red Bhut Jolokia (also known as the Ghost Pepper) and Pimenta de Neyde. It's known for its extremely hot flavor, and its ripened fruits can range in color from dark purple to red. 
Here's a more detailed look at its characteristics: 
Appearance:
The peppers are dark, wrinkled, and can be almost black when fully ripe. They have a smooth, shiny texture and can be somewhat irregular in shape.
Heat:
It's considered extremely hot, with Scoville Heat Units (SHU) potentially reaching 1,000,000.
Flavor:
The peppers have a unique flavor profile, described as having sweet, fruity, and earthy notes.
Plant:
The plants are dark foliage and produce abundant yields of 3.5 inch long peppers