Grist, Voracious Larva // Grist, the Plague Swarm, Vorinclex, Monstrous Raider, Body Launderer, Hidden Herbalists, and Altar of Dementia

Prerequisites

• Grist, Voracious Larva // Grist, the Plague Swarm in the graveyard
• Vorinclex, Monstrous Raider on the battlefield
• Body Launderer on the battlefield
• Hidden Herbalists on the battlefield
• Altar of Dementia on the battlefield
• available

Steps

1. Activate Altar of Dementia by sacrificing Body Launderer
2. When Body Launderer dies, its second ability triggers, returning Grist, Voracious Larva from your graveyard to the battlefield
3. When Grist, Voracious Larva enters the battlefield, it triggers, causing you to pay to exile it and return it to the battlefield as Grist, the Plague Swarm with six loyalty counters due to Vorinclex
4. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Body Launderer's power
5. Activate Grist, the Plague Swarm's third loyalty ability by removing six loyalty counters from it
6. Grist, the Plague Swarm is put into your graveyard as a state-based action due to having zero loyalty
7. Resolve the Grist, the Plague Swarm ability, creating a token copy of each creature card in your graveyard that is a 1/1 Insect
8. When the Grist, Voracious Larva and Hidden Herbalist tokens enter the battlefield, the Hidden Herbalist token triggers once and the Grist, Voracious Larva token triggers for each token created this way
9. Resolve all Grist, Voracious Larva triggers, choosing not to pay
10. Resolve the Hidden Herbalist trigger, adding
11. Activate Altar of Dementia by sacrificing the Grist, Voracious Larva token, causing target player to mill cards equal to Grist's power
12. Repeat from step 1, sacrificing a Body Launderer token instead

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite mill
• Infinite self-mill
• Infinite creature tokens
• Infinite green mana
• Infinite copies of creature cards in your graveyard that are 1/1 Insects