Kenrith, the Returned King, Phyrexian Altar, and Myr Battlesphere

Prerequisites

• Kenrith, the Returned King on the battlefield
• Phyrexian Altar on the battlefield
• Myr Battlesphere in the graveyard
• available

Steps

1. Activate Kenrith's fifth ability by paying , returning Myr Battlesphere to the battlefield from your graveyard
2. When Myr Battlesphere enters the battlefield, it triggers, creating four 1/1 Myr artifact creature tokens
3. Activate Phyrexian Altar five times by sacrificing Myr Battlesphere and the four Myr tokens, adding
4. Repeat

Results

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