Loran, Disciple of History, Teshar, Ancestor's Apostle, Urza's Bauble, Kroxa, Titan of Death's Hunger, and Welding Jar

Prerequisites

• Loran, Disciple of History on the battlefield
• Teshar, Ancestor's Apostle on the battlefield
• Urza's Bauble on the battlefield
• Kroxa, Titan of Death's Hunger on the battlefield
• Welding Jar on the battlefield
• There is at least one additional artifact on the battlefield
• One of either Urza's Bauble or Welding Jar must be in your hand, with the other in your graveyard

Steps

1. Cast the artifact in your hand by paying
2. Teshar triggers, returning Kroxa from your graveyard to the battlefield
3. When Kroxa enters the battlefield, its first and second abilities and Loran trigger
4. Resolve the first Kroxa trigger, sacrificing it
5. Resolve the second Kroxa trigger, causing each opponent to discard a card and lose 3 life if they didn't discard a nonland card
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 LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite storm count
• Infinite lifeloss
• Infinite card draw at the beginning of the next upkeep step
• Infinite draw triggers at the beginning of the next upkeep step