Khârn the Betrayer + Martyrdom + Spiteful Visions + Angel's Grace

Khârn the Betrayer

Martyrdom

Spiteful Visions

Angel's Grace

How it works

1. Cast Martyrdom by paying 1 targeting Khârn.
2. Activate Kharn by paying 0, choosing any target.
3. Cause that target to take damage, dealing that damage to Khârn instead, but instead preventing that damage and causing an opponent of your choice to gain control of Khârn.
4. Khârn triggers, causing you to draw two cards.
5. Spiteful Visions triggers twice.
6. Activate the Martyrdom ability again by paying 0, targeting yourself.
7. Resolve one Spiteful Visions trigger, dealing 1 damage to Khârn, but instead preventing that damage and causing Khârn's controller to give control of Khârn to one of their opponent.
8. Khârn triggers, causing its most recent former controller to draw two cards.
9. Spiteful Visions triggers twice.
10. Resolve one Spiteful Visions trigger, dealing 1 damage to that player.
11. Activate the Martyrdom ability again by paying 0, targeting that same player.
12. Resolve another Spiteful Visions trigger, dealing 1 damage to Khârn, but instead preventing that damage and causing Khârn's controller to give control of Khârn to one of their opponent.
13. If you just lost control of Khârn, repeat steps 4 through 7.
14. If another player just lost control of Khârn, instead repeat steps 8 through 12.
15. Once you have no cards left in your library, cast Angel's Grace by paying so you can't lose the game this turn.
16. Whenever you fail to draw from an empty library in step 4, resolve one of the remaining Spiteful Visions triggers created in step 5 and continue the loop from step 6.