'Then the sixth angel blew his trumpet, and I heard a voice from the four horns of the golden altar before God, saying to the sixth angel who had the trumpet, 'Release the four angels who are bound at the great river Euphrates.' So the four angels were released, who had been held ready for the hour, the day, the month, and the year, to kill a third of mankind.' --Revelations 9:13-15
Part 1 of 4 in this sequence, and one of 20 in my Angel series overall.
Taken directly from the book of Revelations in the Bible, with my own interpretations applied. This is the Angel who guards the North wind.
Ink over pencil.