Kenrith, the Returned King, Phyrexian Altar, and Agatha of the Vile Cauldron

Prerequisites

• Kenrith, the Returned King on the battlefield
• Phyrexian Altar on the battlefield
• Agatha of the Vile Cauldron on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing another nontoken creature, adding
2. Activate Kenrith's fifth ability by paying due to Agatha of the Vile Cauldron, putting the creature card onto the battlefield from your graveyard
3. Repeat

Results

• Infinite death triggers
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers