Olivia Voldaren, Revel in Riches, and Agatha of the Vile Cauldron

Prerequisites

• Olivia Voldaren on the battlefield
• Revel in Riches on the battlefield
• Agatha of the Vile Cauldron on the battlefield
• You have a way to give Olivia deathtouch
• Agatha of the Vile Cauldron has power 1 or greater
• available

Steps

1. Give Olivia deathtouch, if needed
2. Activate Olivia's first ability by paying , dealing 1 damage to a creature an opponent controls, destroying it due to Olivia's deathtouch, and putting a +1/+1 counter on Olivia
3. When the creature dies, Revel in Riches' first ability triggers, creating a Treasure artifact token
4. Activate the Treasure by tapping and sacrificing it, adding
5. Repeat from step 2
6. If you have a way to give Olivia deathtouch indefinitely, you may repeat this loop whenever a creature enters the battlefield under an opponent's control

Results

• Destroy all creatures opponents control
• Destroy all creatures that enter the battlefield under an opponent's control