Yedora, Grave Gardener, Ashnod's Altar, and Kin-Tree Warden

Prerequisites

• Yedora, Grave Gardener on the battlefield
• Ashnod's Altar on the battlefield
• Kin-Tree Warden on the battlefield

Steps

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

Results

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