Yedora, Grave Gardener, Granite Witness, Skirk Alarmist, and Carrion Feeder

Prerequisites

• Yedora, Grave Gardener on the battlefield
• Granite Witness on the battlefield
• Skirk Alarmist on the battlefield
• Carrion Feeder on the battlefield
• Skirk Alarmist does not have summoning sickness

Steps

1. Activate Carrion Feeder by sacrificing Granite Witness
2. When Granite Witness dies, Yedora triggers, returning Granite Witness from your graveyard to the battlefield face-down as a Forest land
3. Resolve the Carrion Feeder ability, putting a +1/+1 counter on it
4. Activate Granite Witness by tapping it, adding
5. Activate Skirk Alarmist by tapping it, turning Granite Witness face-up
6. Granite Witness triggers, untapping Skirk Alarmist
7. Repeat

Results

• Infinite +1/+1 counters on Carrion Feeder
• Infinite death triggers
• Infinite green mana
• Infinite landfall triggers
• Infinite LTB
• Infinite sacrifice triggers