Kenrith, the Returned King, Earthcraft, Agatha of the Vile Cauldron, and Fleshbag Marauder

Prerequisites

• Kenrith, the Returned King on the battlefield
• Earthcraft on the battlefield
• Agatha of the Vile Cauldron on the battlefield
• Fleshbag Marauder in the graveyard
• available

Steps

1. Activate a basic Swamp by tapping it, adding
2. Activate Kenrith's fifth ability by paying due to Agatha, returning Fleshbag Marauder from your graveyard to the battlefield
3. When Fleshbag Marauder enters, it triggers
4. In response, activate Earthcraft by tapping Fleshbag Marauder, untapping the basic Swamp
5. Resolve Fleshbag Marauder's ability, sacrificing it and causing each other player to sacrifice a creature
6. Repeat

Results

• Infinite creature ETB
• Infinite creature LTB
• Infinite death triggers
• Infinite creature sacrifice triggers
• Each opponent sacrifices all creatures they control