Aerid Konstrari, and Agatha of the Vile Cauldron

Prerequisites

• Aerid Konstrari on the battlefield
• Agatha of the Vile Cauldron on the battlefield
• available

Steps

1. Activate Aerid by paying due to Agatha, creating a Heartwood token and giving Aerid +X/+0 until end of turn
2. Activate the Heartwood by tapping it, adding
3. Repeat

Results

• Infinite artifact ETB
• Infinite tapped Heartwood tokens
• Infinite tapped artifact tokens
• Infinitely powerful creature until end of turn