How can you create a combo with Zaxara, the Exemplary, Faces of the Past, Wurmcalling, Kaya, Geist Hunter?
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[START OF COMBO]This combo can be formed with Zaxara, the Exemplary, Faces of the Past, Wurmcalling, Kaya, Geist Hunter

Color identity: GWUB
Mana cost: {2}
Steps:
  1. Activate Kaya's second loyalty ability by removing two loyalty counters from it, causing you to double any tokens you create this turn.
  2. Activate Zaxara by tapping it, adding {G}{G}.
  3. Cast Wurmcalling with buyback by paying {2}{G}{G}.
  4. Zaxara triggers, creating two 0/0 Hydra creature tokens.
  5. The Hydras enter the battlefield and die as a state-based action due to having 0 toughness.
  6. Faces of the Past trigger twice.
  7. Resolve the first trigger, untapping all Hydras.
  8. Activate Zaxara by tapping it, adding {G}{G}.
  9. Resolve the second Faces of the Past trigger, untapping all Hydras.
  10. Resolve Wurmcalling, creating a 0/0 Wurm creature token and returning Wurmcalling to your hand.
  11. The Wurm enters the battlefield and dies as a state-based action due to having 0 toughness.
  12. When the Wurm dies, Faces of the Past triggers, either tapping or untapping all Wurms.
  13. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite magecraft triggers
  - Infinite storm count
  - Infinite untap of all Hydras and Wurms[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Zaxara, the Exemplary must be on the battlefield
  - Faces of the Past must be on the battlefield
  - Wurmcalling must be in your hand
  - Kaya, Geist Hunter must be on the battlefield
  - Zaxara does not have summoning sickness.
  - Kaya has at least two loyalty counters on it.
[END OF COMBO PREREQUISITES]
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