Yedora, Grave Gardener, Phyrexian Altar, and Riptide Pilferer

Prerequisites

• Yedora, Grave Gardener on the battlefield
• Phyrexian Altar on the battlefield
• Riptide Pilferer on the battlefield

Steps

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

Results

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