Enduring Renewal, Phyrexian Altar, Cubwarden, and Centaur Omenreader

Prerequisites

• Enduring Renewal on the battlefield
• Phyrexian Altar on the battlefield
• Cubwarden in hand
• Centaur Omenreader on the battlefield
• You control at least one additional non-Human creature
• Centaur Omenreader is tapped
• available

Steps

1. Cast Cubwarden for its mutate cost by paying , targeting a non-Human creature you control
2. The Cubwarden mutated creature triggers, creating two 1/1 Cat creature tokens
3. Activate Phyrexian Altar by sacrificing the Cubwarden mutated creature, adding
4. When the Cubwarden mutated creature dies, Enduring Renewal triggers, returning Cubwarden and any cards merged with it from your graveyard to your hand
5. Activate Phyrexian Altar by sacrificing a Cat token, adding
6. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count