Yedora, Grave Gardener, Phyrexian Altar, and Foothill Guide

Prerequisites

• Yedora, Grave Gardener on the battlefield
• Phyrexian Altar on the battlefield
• Foothill Guide on the battlefield

Steps

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