Activate Vizkopa Guildmage's second ability by paying ({1} magic symbol) ({W} magic symbol) ({B} magic symbol) , causing each opponent to lose life when you gain life this turn.
Move to your combat phase, and declare Angelic Enforcer as an attacker.
Angelic Enforcer triggers, doubling your life total.
Vizkopa Guildmage triggers, causing each opponent to lose life equal to the life you gained.
Each opponent loses the game due to having zero or less life.