Description from original post
(created 2012-11-13 22:44):

Mark Iz Black (aka Markus) is a player first appearing inEpisode 358 - Yellow Submarine, and is apparently the first African American to join the Scottland Server. He goes by the nickname Markus, after his idol Markus Persson (aka Notch). His voice is first heard at 12:37 into the video and sounds extremely deep.
Markus was born and raised in the city of Honolulu, Hawaii. His middle name was named after Israel "IZ" Kaʻanoʻi Kamakawiwoʻole, the famous Hawaiian singer. By day, he is a Special Agent in the Federal Bureau of Investigation, but by night he is the deadly assassin known as o Black Mambao . His penis is as big as a $5 footlong.
There is much controversy behind this mysterious player, with many debating if he exists or not. His actual existence is brought into question when Brett asked Markus to sing a duet along with Adam and Markus was unable to do so. This leads many to believe that Adam disguised his voice. However, Adam and Markus are very good friends and they never want to outshow the other while singing a song. This causes them to never sing at the same time. - Wiki