Dark Master - Zorc (CP02-EN010) - Champion Pack 2 Unlimited

This card can only be Ritual Summoned with the Ritual Spell Card, "Contract with the Dark Master". During your Main Phase, you can roll 1 six-sided die. On a 1 or 2, destroy all monsters on your opponent's side of the field. On a 3, 4, or 5, destroy 1 monster on your opponent's side of the field. On a 6, destroy all monsters on your side of the field.