Teshar, Ancestor's Apostle, Cloudstone Curio, Uro, Titan of Nature's Wrath, Ornithopter, and Shield Sphere

Prerequisites

• Teshar, Ancestor's Apostle on the battlefield
• Cloudstone Curio on the battlefield
• Uro, Titan of Nature's Wrath on the battlefield or in the graveyard
• Ornithopter in hand or on the battlefield
• Shield Sphere in hand or on the battlefield
• One of the cost creatures must be in your hand, and the other must be on the battlefield

Steps

1. Cast the historic creature from your hand by paying
2. Teshar triggers, returning Uro from your graveyard to the battlefield
3. When Uro enters the battlefield, its first and second abilities and Cloudstone Curio trigger
4. Resolve the first Uro trigger, causing you to sacrifice it
5. Resolve the second Uro trigger, causing you to gain 3 life and draw a card, and allowing you to put a land card from your hand onto the battlefield
6. Resolve the Cloudstone Curio trigger, returning the other historic creature with mana cost from the battlefield to your hand
7. Resolve the creature spell cast in step 1
8. Repeat

Results

• Infinite card draw
• Near-infinite lifegain
• Near-infinite lifegain triggers
• Near-infinite ETB
• Infinite draw triggers
• Near-infinite storm count
• Near-infinite landfall triggers
• Near-infinite LTB
• Near-infinite death triggers
• Near-infinite sacrifice triggers
• Put all lands from your hand and library onto the battlefield