Wall of Blood and Vizkopa Guildmage on the battlefield.
Your life total is greater than each opponent's.
Note: you may halve the life total requirement for each additional ({1} magic symbol) ({W} magic symbol) ({B} magic symbol) available, repeating step 1 additional times.
Activate Vizkopa Guildmage's second ability by paying ({1} magic symbol) ({W} magic symbol) ({B} magic symbol) , creating a delayed triggered ability.
Activate Wall of Blood's ability multiple times by paying 1 life each time until you are at 1 life, giving Wall of Blood +1/+1 until end of turn for each activation.
Cast Swords to Plowshares by paying ({W} magic symbol) , exiling Wall of Blood and gaining life equal to its power.
The delayed triggered ability from Vizkopa Guildmage triggers, causing each opponent to lose that much life.