Koll, the Forgemaster, Fervent Champion, Paradise Mantle, and Mortarpod

Prerequisites

• Koll, the Forgemaster on the battlefield
• Fervent Champion on the battlefield
• Paradise Mantle on the battlefield
• Mortarpod on the battlefield

Steps

1. Activate Paradise Mantle by paying , attaching it to Fervent Champion
2. Activate Fervent Champion by tapping it, adding
3. Activate Mortarpod's ability by paying , attaching it to Fervent Champion
4. Activate Fervent Champion's ability from Mortarpod by sacrificing it
5. Koll triggers, returning Fervent Champion from your graveyard to your hand
6. Resolve the Fervent Champion ability, dealing 1 damage to any target
7. Cast Fervent Champion by paying
8. Repeat

Results

• Infinite damage
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count