Yedora, Grave Gardener, Embodiment of Insight, and Phyrexian Altar

Prerequisites

• Yedora, Grave Gardener on the battlefield
• Embodiment of Insight on the battlefield
• Phyrexian Altar on the battlefield
• You control a nontoken land creature

Steps

1. Activate Phyrexian Altar by sacrificing a nontoken land creature, adding one mana of any color
2. The land creature dies, triggering Yedora, returning it to the battlefield face down as a Forest land
3. The Forest enters the battlefield, triggering Embodiment of Insight, causing the Forest to become a 3/3 Elemental creature with haste in addition to its other types
4. Repeat

Results

• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite landfall triggers
• Infinite LTB
• Infinite sacrifice triggers