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