Tortured Existence, Pitiless Plunderer, Insidious Roots, and Carrion Feeder

Prerequisites

• Tortured Existence on the battlefield
• Pitiless Plunderer on the battlefield
• Insidious Roots on the battlefield
• Carrion Feeder on the battlefield
• available

Steps

1. Activate Tortured Existence by paying and discarding a creature card, returning another creature card from your graveyard to your hand
2. Insidious Roots triggers, creating a creature token
3. Activate Carrion Feeder by sacrificing the creature token
4. When the creature token dies, Pitiless Plunderer triggers, creating a Treasure token
5. Resolve the Carrion Feeder ability
6. Activate a Treasure by tapping and sacrificing it, adding
7. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite self-discard triggers
• Infinite +1/+1 counters on Carrion Feeder
• Infinite +1/+1 counters on Plants you control