Yedora, Grave Gardener, Branchsnap Lorian, and Ashnod's Altar

Prerequisites

• Yedora, Grave Gardener on the battlefield
• Branchsnap Lorian on the battlefield
• Ashnod's Altar on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing Branchsnap Lorian, adding
2. When Branchsnap Lorian dies, Yedora triggers, returning Branchsnap Lorian from your graveyard to the battlefield face down as a Forest land
3. Activate Branchsnap Lorian by tapping it, adding
4. Activate Branchsnap Lorian's morph ability by paying , turning it face up
5. Repeat

Results

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