Enduring Renewal + Phyrexian Altar + Cubwarden + Planar Gate

Prerequisites

• You control a non-Human creature.

Steps

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

Effects

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