Kenrith, the Returned King, Su-Chi Cave Guard, and Phyrexian Altar

Prerequisites

• Kenrith, the Returned King on the battlefield
• Su-Chi Cave Guard on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Su-Chi Cave Guard, adding
2. When Su-Chi Cave Guard dies, it triggers, adding eight
3. Activate Kenrith's fifth ability by paying , returning Su-Chi Cave Guard from your graveyard to the battlefield
4. Repeat

Results

• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers