Fiend Hunter, Bloodthrone Vampire, and Karmic Guide

Prerequisites

• Fiend Hunter in hand
• Bloodthrone Vampire on the battlefield
• 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 Bloodthrone Vampire 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 Bloodthrone Vampire ability
8. Repeat from step 3

Results

• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinitely large creature until end of turn