Yedora, Grave Gardener, Phyrexian Altar, and Ainok Survivalist

Prerequisites

• Yedora, Grave Gardener on the battlefield
• Phyrexian Altar on the battlefield
• Ainok Survivalist on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Ainok Survivalist, adding
2. When Ainok Survivalist dies, Yedora triggers, returning Ainok Survivalist from your graveyard to the battlefield face down as a Forest land
3. Activate Ainok Survivalist by tapping it, adding
4. Activate Ainok Survivalist's megamorph ability by paying , turning it face up
5. Ainok Surivialist triggers, destroying target artifact and/or enchantment an opponent controls
6. Repeat
7. You may also repeat this loop whenever an artifact and/or enchantment enters the battlefield under an opponent's control

Results

• Destroy all artifacts and enchantments opponents control
• Destroy all artifacts and enchantments that enter the battlefield under an opponent's control
• Infinite death triggers
• Infinite landfall triggers
• Infinite LTB
• Infinite sacrifice triggers