Combo result
Infinite self-mill. Near-infinite black mana. Near-infinite self-discard triggers. Prerequisites
Nightmare Void in hand. All permanents on the battlefield.
Chains of Mephistopheles + Bone Miser + Nightmare Void
Combo result
Infinite self-mill. Prerequisites
Nightmare Void in hand. All other permanents on the battlefield. Two additional noncreature nonland cards in hand. One additional card of any type in hand. {B} available.