Koll, the Forgemaster, Deathrender, and Mogg Fanatic

Prerequisites

• Koll, the Forgemaster on the battlefield
• Deathrender on the battlefield
• Mogg Fanatic on the battlefield
• Deathrender attached to Mogg Fanatic

Steps

1. Sacrifice Mogg Fanatic to deal 1 damage to any target
2. Koll and Deathrender trigger
3. Stack the triggers so that Koll's trigger resoves first
4. Koll returns Mogg Fanatic to your hand
5. Deathrender's trigger resolves, putting Mogg Fanatic from your hand onto the battlefield, and attaching Deathrender to it
6. Repeat

Results

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