Enduring Angel // Angelic Enforcer and Sanguine Bond on the battlefield.
Angelic Enforcer does not have summoning sickness.
Your life total is higher than or equal to an opponent's.
Steps
Declare Angelic Enforcer as an attacker.
Angelic Enforcer triggers, doubling your life total.
Sanguine Bond triggers, causing target opponent whose lifetotal is less than or equal to Angelic Enforcer's power to lose life equal to the life you gained.
The opponent loses the game due to having zero or less life.