Blossoming Tortoise, Dryad Arbor, Infinite Reflection, and Altar of Dementia

Prerequisites

• Blossoming Tortoise on the battlefield
• Dryad Arbor in hand
• Infinite Reflection on the battlefield
• Altar of Dementia on the battlefield
• Infinite Reflection attached to Blossoming Tortoise

Steps

1. Play Dryad Arbor
2. When Dryad Arbor enters the battlefield as a copy of Blossoming Tortoise due to Infinite Reflection, it triggers
3. Holding priority, activate Altar of Dementia by sacrificing Dryad Arbor, causing target player to mill cards equal to Dryad Arbor's power
4. Resolve the Dryad Arbor trigger from step 2, causing you to mill three cards and return Dryad Arbor from your graveyard to the battlefield
5. Repeat from step 2

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mill
• Infinite sacrifice triggers
• Infinite self-mill