Dark Master - Zorc (DR1-EN244) [Dark Revelation Volume 1]

This card can only be Ritual Summoned with the Ritual Spell Card, "Contract with the Dark Master". You must also Tribute monsters whose total Levels equal 8 from the field or your hand. During your turn, you can roll 1 six-sided die. If the result is 1 or 2, destroy all monsters on your opponent's side of the field. If the result is 3, 4, or 5, destroy 1 monster on your opponent's side of the field. If the result is 6, destroy all monsters on your side of the field.