How can you create a combo with Havi, the All-Father, Saffi Eriksdotter, Uro, Titan of Nature's Wrath?
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[START OF COMBO]This combo can be formed with Havi, the All-Father, Saffi Eriksdotter, Uro, Titan of Nature's Wrath

Color identity: RGWU
Mana cost: {1}{G}{U}
Steps:
  1. Cast Uro by paying {1}{G}{U}.
  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.[END OF COMBO STEPS]

Result:
  - Infinite card draw
  - Near-infinite lifegain
  - Near-infinite lifegain triggers
  - Near-infinite enters the battlefield
  - Infinite draw triggers
  - Near-infinite landfall triggers
  - Near-infinite leaves the battlefield
  - Near-infinite death triggers
  - Near-infinite sacrifice triggers
  - Put all land cards from your hand and library onto the battlefield[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Havi, the All-Father must be on the battlefield
  - Saffi Eriksdotter must be on the battlefield
  - Uro, Titan of Nature's Wrath must be in your hand
[END OF COMBO PREREQUISITES]
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