Kenrith, the Returned King, Earthcraft, Agatha of the Vile Cauldron, and Sakura-Tribe Elder

Prerequisites

• Kenrith, the Returned King on the battlefield
• Earthcraft on the battlefield
• Agatha of the Vile Cauldron on the battlefield
• Sakura-Tribe Elder in the graveyard

Steps

1. Activate a basic Swamp by tapping it, adding
2. Activate Kenrith's fifth ability by paying due to Agatha, returning Sakura-Tribe Elder from your graveyard to the battlefield
3. Activate Earthcraft by tapping Sakura-Tribe Elder, untapping the basic Swamp
4. Activate Sakura-Tribe Elder by sacrificing it
5. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite sacrifice triggers
• Put all basic lands from your library onto the battlefield tapped