Yedora, Grave Gardener, Altar of Dementia, and Rattleclaw Mystic

Prerequisites

• Yedora, Grave Gardener on the battlefield
• Altar of Dementia on the battlefield
• Rattleclaw Mystic on the battlefield

Steps

1. Activate Altar of Dementia by sacrificing Rattleclaw Mystic
2. When Rattleclaw Mystic dies, Yedora triggers, returning Rattleclaw Mystic from your graveyard to the battlefield face down as a Forest land
3. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Rattleclaw Mystic's power
4. Activate Rattleclaw Mystic's morph ability by paying , turning it face up
5. Rattleclaw Mystic triggers, adding
6. Repeat

Results

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