Activate Skirge Familiar by discarding Moldervine Cloak, adding {B}.
Bone Miser's third ability triggers, causing you to mill two cards and return Moldervine Cloak from your graveyard to your hand.
Repeat.

Infinite self-mill

Near-infinite black mana

Near-infinite self-discard triggers

Bone Miser

Moldervine Cloak

Skirge Familiar

Attempt to draw a card. The draw will be replaced by Chains of Mephistopheles, causing you to instead discard Moldervine Cloak. Then, you will mill two cards and return Moldervine Cloak from your graveyard to your hand due to Moldervine Cloak's dredge ability.
Bone Miser's third ability triggers, attempting to have you draw a card. The draw will be replaced by Chains of Mephistopheles, causing you to instead discard Moldervine Cloak. Then, you will mill two cards and return Moldervine Cloak from your graveyard to your hand due to Moldervine Cloak's dredge ability.
Repeat step 2.

Combos with "Moldervine Cloak"