Yomiji, Who Bars the Way, Deathrender, and Phyrexian Altar

Prerequisites

• Yomiji, Who Bars the Way on the battlefield
• Deathrender on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing the non-Yomiji legendary creature, adding one mana of any color
2. Yomiji and Deathrender trigger
3. Resolve the Yomiji trigger, returning the legendary card from your graveyard to your hand
4. Resolve the Deathrender trigger, putting that card onto the battlefield from your hand and attaching Deathrender to it
5. Repeat

Results

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