How can you create a combo with Orvar, the All-Form, Peregrine Drake, Seething Anger?
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[START OF COMBO]This combo can be formed with Orvar, the All-Form, Peregrine Drake, Seething Anger

Color identity: UR
Mana cost: 
Steps:
  1. Activate up to five lands you control by tapping them, adding at least {3}{R}.
  2. Cast Seething Anger with buyback by paying {3}{R}, targeting Peregrine Drake.
  3. Orvar's first ability triggers, creating a token copy of Peregrine Drake.
  4. When the Peregrine Drake token enters the battlefield, it triggers, untapping up to five lands.
  5. Resolve Seething Anger, giving the nontoken Peregrine Drake +3/+0 until end of turn and returning Seething Anger to your hand.
  6. Repeat.
  7. If you control up to five lands that can tap to produce at least {4}{R}, this combo nets infinite mana, which you can then target any creatures you control in step 2 to create infinite token copies of them.[END OF COMBO STEPS]

Result:
  - Infinite copies of creatures you control
  - Infinite creature tokens
  - Infinite enters the battlefield
  - Infinitely powerful creatures until end of turn
  - Infinite magecraft triggers
  - Infinite mana lands you control can produce
  - Infinite storm count
  - Infinite untap of lands you control[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Orvar, the All-Form must be on the battlefield
  - Peregrine Drake must be on the battlefield
  - Seething Anger must be in your hand
  - You control up to five lands that can tap to produce at least {3}{R}.
[END OF COMBO PREREQUISITES]
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