Yedora, Grave Gardener, Proteus Machine, and Altar of Dementia

Prerequisites

• Yedora, Grave Gardener on the battlefield
• Proteus Machine on the battlefield
• Altar of Dementia on the battlefield

Steps

1. Activate Altar of Dementia by sacrificing Proteus Machine
2. Proteus Machine dies, triggering Yedora, returning Proteus Machine to the battlefield face down as a Forest land with no other types or abilities
3. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Proteus Machine's power
4. Activate Proteus Machine by tapping it, adding
5. Activate Proteus Machine's morph ability by paying , turning it face up
6. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite green mana
• Infinite landfall triggers
• Infinite LTB
• Infinite mill
• Infinite sacrifice triggers
• Infinite self-mill