The Genghis Khan Brain pepper is a superhot pepper variety developed by AIASP in Italy. It's known for its extremely high heat level, estimated to be over 1,500,000 SHUs on the Scoville Heat Scale. The pepper also has a distinctive, rough, pimply outer skin that turns green to red when ripe. 
Here's a more detailed breakdown:
Heat Level: The Genghis Khan Brain is considered extremely hot, rivaling other superhot peppers. 
Appearance: The pods have a knobby, rough surface structure, resembling a brain. 
Flavor: When ripe, the pepper has fruity tones. 
Plant Size: Genghis Khan Brain plants can grow over 4 feet tall. 
Parentage: The Genghis Khan Brain is a cross between a Trinidad Scorpion and another (presumably very hot) pepper. 
Origin: The pepper was developed and released by AIASP (Associazione Italiana Addetti Statistiche Pallacanestro) in Italy. 
Similarities to other peppers: The heat and scent are similar to other red Brain Strain pepper varieties. 
Other Brain Strain peppers: Other Brain Strain peppers like the Red Naga Brain and Scotch Brain Strain Orange pepper are also known for their high heat and distinctive wrinkled appearance.