Kaalia of the Vast, and Master of Cruelties

Prerequisites

• Kaalia of the Vast on the battlefield
• Master of Cruelties in hand
• Kaalia of the Vast does not have summoning sickness
• An opponent cannot block and kill Kaalia of the Vast
• That opponent cannot block Master of Cruelties

Steps

1. Declare Kaalia of the Vast as an attacker
2. Kaalia of the Vast triggers, causing you to put Master of Cruelties from your hand onto the battlefield tapped and attacking
3. When Master of Cruelties isn't blocked, it triggers, causing defending player's life total to become 1 and causing Master of Cruelties to deal no combat damage this turn
4. Kaalia of the Vast deals lethal combat damage to defending player

Results

• Target opponent loses the game