Junji, the Midnight Sky, Bloodthrone Vampire, Karmic Guide, and Vengeful Bloodwitch

Prerequisites

• Junji, the Midnight Sky on the battlefield
• Bloodthrone Vampire on the battlefield
• Karmic Guide on the battlefield
• Vengeful Bloodwitch on the battlefield

Steps

1. Activate Bloodthrone Vampire by sacrificing Karmic Guide
2. When Karmic Guide dies, Vengeful Bloodwitch triggers, causing an opponent to lose 1 life and you to gain 1 life
3. Resolve the Bloodthrone Vampire ability
4. Activate Bloodthrone Vampire by sacrificing Junji
5. When Junji dies, it and Vengeful Bloodwitch trigger
6. Resolve the Vengeful Bloodwitch trigger, causing an opponent to lose 1 life and you to gain 1 life
7. Resolve the Junji trigger, returning Karmic Guide from your graveyard to the battlefield and causing you to lose 2 life
8. When Karmic Guide enters, it triggers, returning Junji from your graveyard to the battlefield
9. Resolve the Bloodthrone Vampire ability
10. Repeat

Results

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