Koll, the Forgemaster, Reckless Barbarian, and Stormrider Rig

Prerequisites

• Koll, the Forgemaster on the battlefield
• Reckless Barbarian on the battlefield
• Stormrider Rig on the battlefield
• Stormrider Rig attached to Reckless Barbarian

Steps

1. Activate Reckless Barbarian by sacrificing it, adding
2. When Reckless Barbarian dies, Koll triggers, returning Reckless Barbarian from your graveyard to your hand
3. Cast Reckless Barbarian by paying
4. When Reckless Barbarian enters the battlefield, Stormrider Rig triggers, attaching itself to Reckless Barbarian
5. Repeat

Results

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