Chains of Mephistopheles + Dredger's Insight + Shambling Shell + Marina Vendrell's Grimoire

Prerequisites

• You have a way to draw a card.

Steps

1. 1Attempt to draw a card.
2. 2The draw will be replaced by Chains of Mephistopheles, instead causing you to discard Shambling Shell. Then, the draw will be replaced by Shambling Shell's dredge ability, causing you to mill cards and return Shambling Shell from your graveyard to your hand.
3. 3Dredger's Insight's first ability triggers, causing you to gain 1 life.
4. 4Marina Vendrell's Grimoire triggers, attempting to draw a card.
5. 5Repeat from step 2.

Effects

• Infinite self-mill
• Near-infinite lifegain
• Near-infinite lifegain triggers
• Near-infinite self-discard triggers