Loran, Disciple of History, Teshar, Ancestor's Apostle, Urza's Bauble, Uro, Titan of Nature's Wrath, and Welding Jar

Prerequisites

• Loran, Disciple of History on the battlefield
• Teshar, Ancestor's Apostle on the battlefield
• Urza's Bauble on the battlefield
• Uro, Titan of Nature's Wrath on the battlefield
• Welding Jar on the battlefield

Steps

1. Cast the artifact in 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 Loran trigger
4. Resolve the first Uro trigger, sacrificing 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 Loran trigger, returning the other cost artifact from your graveyard to your hand
7. Resolve the spell cast in step 1
8. Activate the cost artifact by sacrificing it
9. Repeat

Results

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