Rancor, Phyrexian Altar, Composer of Spring, and Endless Cockroaches

Prerequisites

• Rancor in hand
• Phyrexian Altar on the battlefield
• Composer of Spring on the battlefield
• Endless Cockroaches on the battlefield
• You control at least six enchantments
• available

Steps

1. Cast Rancor by paying , attaching it to Endless Cockroaches
2. When Rancor enters the battlefield, Composer of Spring triggers
3. Holding priority, activate Phyrexian Altar by sacrificing Endless Cockroaches, adding
4. When Endless Cockroaches dies, it and Rancor trigger
5. Resolve the Rancor trigger, returning it to your hand from the battlefield
6. Resolve the Endless Cockroaches trigger, returning it to your hand from the battlefield
7. Resolve the Composer of Spring ability from step 2, putting Endless Cockroaches onto the battlefield from your hand
8. Repeat

Results

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