Sartorius was once a simple fortune teller until he was possessed by the Light of Destruction. He then became a powerful duelist bent on destroying the world through any means necessary, using his powers as a fortune teller to predict his opponent's moves. He was returned to normal after being defeated by the combined efforts of Jaden and Aster, and later helped them later in the series.
Sartorius uses an Arkana Force deck based on tarot cards, gaining effects depending on which side the coin lands with one positive and one negative. His ace monstersare Arcana Force EX - The Light Ruler and Arcana Force EX - The Dark Ruler, very powerful monsters with positive effects regardless of whether you flip heads or tails.
Funny thing about his archetype: Despite relying on coin flips and a bit of luck in the actual cards, (they spun until declared to halt in the show) some really silly stuff can happen. I have had multiple games with my pure Arcana Force deck where I brought out The World with Valhalla, into The Emperor, into constant turn skips. Max damage based on a first turn kill was a little over 15,000 with 1 World and 3 Emperors as the only monsters before we stopped counting.