How can you create a combo with Beledros Witherbloom, Urza's Saga, Agatha's Soul Cauldron, Arwen, Weaver of Hope, Verdant Sun's Avatar?
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[START OF COMBO]This combo can be formed with Beledros Witherbloom, Urza's Saga, Agatha's Soul Cauldron, Arwen, Weaver of Hope, Verdant Sun's Avatar

Color identity: BG
Mana cost: 
Steps:
  1. Activate any number of lands except Urza's Saga by tapping them, adding at least {2}.
  2. Activate Urza's Saga's second ability by paying {2} and tapping it, creating a 0/0 Construct artifact creature token that gets +1/+1 for each artifact you control, and that enters the battlefield with a number of +1/+1 counters equal to Arwen's toughness.
  3. When the Construct enters the battlefield, Verdant Sun's Avatar triggers, causing you to gain at least 10 life.
  4. Activate the Construct using Beledros Witherbloom's ability by paying 10 life, untapping all lands you control.
  5. Repeat.
  6. If other lands you control can tap to produce at least {3}, this combo nets infinite mana.[END OF COMBO STEPS]

Result:
  - Infinite creature tokens
  - Infinite enters the battlefield
  - Infinite lifegain
  - Infinite lifegain triggers
  - Infinitely large Construct tokens
  - Infinite mana lands you control can produce
  - Infinite untap of lands you control[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Beledros Witherbloom must be exiled
  - Urza's Saga must be on the battlefield
  - Agatha's Soul Cauldron must be on the battlefield
  - Arwen, Weaver of Hope must be on the battlefield
  - Verdant Sun's Avatar must be on the battlefield
  - Urza's Saga has two lore counters on it.
  - Lands you control except Urza's Saga can tap to produce at least {2}.
  - The number of artifacts you control plus Arwen's toughness is equal to or greater than 9.
[END OF COMBO PREREQUISITES]
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