Koll, the Forgemaster, Kemba, Kha Enduring, Ashnod's Altar, and Watchers of the Dead

Prerequisites

• Koll, the Forgemaster on the battlefield
• Kemba, Kha Enduring on the battlefield
• Ashnod's Altar on the battlefield
• Watchers of the Dead on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Watchers of the Dead, adding
2. Watchers of the Dead dies, triggering Koll, returning Watchers of the Dead from your graveyard to your hand
3. Cast Watchers of the Dead by paying
4. Watchers of the Dead enters the battlefield, triggering Kemba, attaching any Equipment you control to it
5. Repeat

Results

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