Beifong's Bounty Hunters, and Sifter of Skulls

Prerequisites

• Beifong's Bounty Hunters on the battlefield
• Sifter of Skulls on the battlefield

Steps

1. Activate an Eldrazi Scion by sacrificing it, adding
2. When the Eldrazi Scion dies, Beifong's Bounty Hunters triggers, earthbending a land you control
3. The earthbent land will become a 0/0 creature and dies as a state-based action due to having 0 toughness
4. When the land dies, it and Sifter of Skulls trigger
5. Resolve the land's trigger, returning it from your graveyard to the battlefield tapped
6. Resolve the Sifter of Skulls trigger, creating a 1/1 Eldrazi Scion creature token
7. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite colorless mana
• Infinite death triggers
• Infinite landfall triggers
• Infinite sacrifice triggers