Enduring Renewal, Composer of Spring, and Carrion Feeder

Prerequisites

• Enduring Renewal on the battlefield
• Composer of Spring on the battlefield
• Carrion Feeder on the battlefield
• You have an enchantment creature card in hand
• You control at least six enchantments
• You have enough mana to cast the enchantment creature

Steps

1. Cast the enchantment creature by paying its mana cost
2. When the creature enters the battlefield, Composer of Spring triggers
3. Holding priority, activate Carrion Feeder by sacrificing the enchantment creature
4. When the enchantment creature dies, Enduring Renewal triggers, returning the enchantment creature to your hand from your graveyard
5. Resolve the Carrion Feeder ability from step 3, putting a +1/+1 counter on it
6. Resolve the Composer of Spring trigger from step 2, putting the enchantment creature onto the battlefield from your hand
7. Repeat from step 2

Results

• Infinite +1/+1 counters on Carrion Feeder
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers