Yedora, Grave Gardener, Phyrexian Altar, and Whipcorder

Prerequisites

• Yedora, Grave Gardener on the battlefield
• Phyrexian Altar on the battlefield
• Whipcorder on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Whipcorder, adding
2. When Whipcorder dies, Yedora triggers, returning Whipcorder from your graveyard to the battlefield face down as a Forest land
3. Activate Whipcorder by tapping it, adding
4. Activate Whipcorder'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