How can you create a combo with Grovetender Druids, Xenograft, Ashnod's Altar?
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[START OF COMBO]This combo can be formed with Grovetender Druids, Xenograft, Ashnod's Altar

Color identity: GWU
Mana cost: {3}{G}{W}
Steps:
  1. Cast Grovetender Druids by paying {2}{G}{W}.
  2. When Grovetender Druids enters the battlefield, it triggers, causing you to pay {1} to create a 1/1 Plant creature token.
  3. When the Plant enters the battlefield as an Ally due to Xenograft, Grovetender Druids triggers.
  4. Holding priority, activate Ashnod's Altar by sacrificing the Plant, adding {C}{C}.
  5. Resolve the Grovetender Druids trigger, causing you to pay {1} to create a 1/1 Plant creature token.
  6. Repeat from step 3.
  7. Once you have infinite mana, you may forego sacrificing the Plants.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana
  - Infinite creature tokens
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Grovetender Druids must be in your hand
  - Xenograft must be on the battlefield
  - Ashnod's Altar must be on the battlefield
  - "Ally" chosen with Xenograft.
[END OF COMBO PREREQUISITES]
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