Yedora, Grave Gardener, and Proteus Machine

Prerequisites

• Yedora, Grave Gardener on the battlefield
• Proteus Machine on the battlefield

Steps

1. Activate Proteus Machine's morph ability by paying , turning it face-up
2. Proteus Machine triggers, causing it to become a Saproling
3. Activate the sacrifice outlet by sacrificing Proteus Machine
4. When Proteus Machine dies, Yedora triggers, returning Proteus Machine from your graveyard to the battlefield face-down as a Forest land
5. Resolve the sacrifice outlet's ability, giving all Saprolings +1/+1 until end of turn
6. Activate Proteus Machine by tapping it, adding
7. Repeat

Results

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