Oathkeeper, Takeno's Daisho, Carrion Feeder, and Kemba, Kha Enduring

Prerequisites

• Oathkeeper, Takeno's Daisho on the battlefield
• Carrion Feeder on the battlefield
• Kemba, Kha Enduring on the battlefield

Steps

1. Activate Carrion Feeder by sacrificing the creature with changeling
2. When that creature dies, Oathkeeper triggers, returning it from your graveyard to the battlefield
3. When that creature enters, Kemba triggers, allowing you to attach Oathkeeper to that creature
4. Resolve the Carrion Feeder ability
5. Repeat

Results

• Infinite +1/+1 counters on a creature
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers