Carrion Feeder, Fiend Hunter, and Karmic Guide

Prerequisites

• Carrion Feeder on the battlefield
• Fiend Hunter in hand
• Karmic Guide on the battlefield
• available

Steps

1. Cast Fiend Hunter by paying its mana cost
2. When Fiend Hunter enters, its first ability triggers, exiling Karmic Guide
3. Activate Carrion Feeder by sacrificing Fiend Hunter
4. When Fiend Hunter dies, its second ability triggers, returning Karmic Guide from exile to the battlefield
5. When Karmic Guide enters, it triggers, returning Fiend Hunter from your graveyard to the battlefield
6. When Fiend Hunter enters, its first ability triggers, exiling Karmic Guide
7. Resolve the Carrion Feeder ability
8. Repeat from step 3

Results

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