Havi, the All-Father, Saffi Eriksdotter, and Uro, Titan of Nature's Wrath

Prerequisites

• Havi, the All-Father on the battlefield
• Saffi Eriksdotter on the battlefield
• Uro, Titan of Nature's Wrath in hand
• available

Steps

1. Cast Uro by paying
2. When Uro enters the battlefield, its first and second abilities trigger
3. Holding priority, activate Saffi by sacrificing it, targeting Uro
4. When Saffi dies, Havi triggers, returning any legendary creature card with mana value 1 or less from your graveyard to the battlefield
5. Resolve the Saffi ability
6. Resolve the second Uro trigger, causing you to gain 3 life and draw a card, and allowing you to put a land from your hand onto the battlefield
7. Resolve the first Uro trigger, causing you to sacrifice it
8. When Uro dies, Havi and Saffi trigger
9. Resolve the Havi trigger, returning Saffi from your graveyard to the battlefield
10. Resolve the Saffi trigger, returning Uro from your graveyard to the battlefield
11. Repeat from step 2

Results

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