Koll, the Forgemaster, Demonmail Hauberk, Kobolds of Kher Keep, and Phyrexian Walker

Prerequisites

• Koll, the Forgemaster on the battlefield
• Demonmail Hauberk on the battlefield
• Kobolds of Kher Keep on the battlefield
• Phyrexian Walker on the battlefield
• Demonmail Hauberk attached to Kobolds of Kher Keep

Steps

1. Activate Demonmail Hauberk's equip ability by sacrificing Kobolds of Kher Keep, targeting Phyrexian Walker
2. When Kobolds of Kher Keep dies, Koll triggers, returning Kobolds of Kher Keep from your graveyard to your hand
3. Resolve the Demonmail Hauberk ability, attaching it to Phyrexian Walker
4. Cast Kobolds of Kher Keep by paying
5. Activate Demonmail Hauberk's equip ability by sacrificing Phyrexian Walker, targeting Kobolds of Kher Keep
6. When Phyrexian Walker dies, Koll triggers, returning Phyrexian Walker from your graveyard to your hand
7. Resolve the Demonmail Hauberk ability, attaching it to Kobolds of Kher Keep
8. Cast Phyrexian Walker by paying
9. Repeat

Results

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