Saffi Eriksdotter, Bloodthrone Vampire, and Karmic Guide

Prerequisites

• Saffi Eriksdotter on the battlefield
• Bloodthrone Vampire on the battlefield
• Karmic Guide on the battlefield

Steps

1. Activate Saffi by sacrificing it, targeting Karmic Guide Activate Bloodthrone Vampire by sacrificing Karmic Guide When Karmic Guide dies, Saffi triggers, returning Karmic Guide from your graveyard to the battlefield
2. When Karmic Guide enters, it triggers, returning Saffi from your graveyard to the battlefield
3. Resolve the Bloodthrone Vampire ability
4. Repeat

Results

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