Kenrith, the Returned King, Agatha of the Vile Cauldron, Hajar, Loyal Bodyguard, and Relic of Legends

Prerequisites

• Kenrith, the Returned King on the battlefield
• Agatha of the Vile Cauldron on the battlefield
• Hajar, Loyal Bodyguard on the battlefield
• Relic of Legends on the battlefield
• Agatha of the Vile Cauldron has power 3 or greater

Steps

1. Activate Relic of Legends' second ability by tapping Hajar, adding
2. Activate Hajar by sacrificing it, giving legendary creatures you control +1/+0 and indestructible until end of turn
3. Activate Kenrith's fifth ability by paying , returning Hajar from your graveyard to the battlefield
4. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinitely powerful legendary creatures you control until end of turn
• Infinite sacrifice triggers