Atla Palani, Nest Tender, Triumph of Saint Katherine, Maskwood Nexus, and Phyrexian Altar

Prerequisites

• Atla Palani, Nest Tender on the battlefield
• Triumph of Saint Katherine on the battlefield
• Maskwood Nexus on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Triumph of Saint Katherine, adding one mana of any color
2. Triumph of Saint Katherine dies, triggering itself and Atla Palani
3. Resolve the Triumph of Saint Katherine trigger, exiling it and the top six cards of your library into a face-down pile, then shuffling that pile and putting it on top of your library
4. Resolve the Atla Palani trigger, revealing cards from the top of your library until you reveal a creature card and putting that card onto the battlefield
5. Activate Phyrexian Altar by sacrificing that creature, adding one mana of any color
6. Repeat from step 4 until Triumph of Saint Katherine is on the battlefield again
7. Repeat from step 1

Results

• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Put all creatures in your library onto the battlefield, then into your graveyard