Tatyova, Steward of Tides, Yedora, Grave Gardener, and Ashnod's Altar

Prerequisites

• Tatyova, Steward of Tides on the battlefield
• Yedora, Grave Gardener on the battlefield
• Ashnod's Altar on the battlefield
• You control an additional nontoken creature
• You control at least six lands

Steps

1. Activate Ashnod's Altar by sacrificing a nontoken creature, adding
2. The creature dies, triggering Yedora, returning the creature from your graveyard to the battlefield face down as a Forest land
3. The face-down Forest enters the battlefield, triggering Tatyova, causing the Forest to become a 3/3 Elemental with haste until end of turn
4. Activate the Forest by tapping it, adding
5. Repeat

Results

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