Carrion Howler + Vizkopa Guildmage + Oketra's Last Mercy

Carrion Howler

Vizkopa Guildmage

Oketra's Last Mercy

How it works

1. Activate Vizkopa Guildmage by paying 1, causing each opponent to lose life whenever you gain life this turn.
2. Activate Carrion Howler by paying 1 life.
3. Repeat step 2 until you have one life.
4. Resolve all Carrion Howler abilities, giving itself +2/-1 for each ability.
5. Cast Oketra's Last Mercy by paying 1, causing your life total to become forty.
6. Vizkopa Guildmage triggers, causing each opponent to lose thirty-nine life.
7. Each opponent loses the game due to having zero or less life.