How can you create a combo with Yenna, Redtooth Regent, Instill Energy, Auratog?
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[START OF COMBO]This combo can be formed with Yenna, Redtooth Regent, Instill Energy, Auratog

Color identity: GW
Mana cost: 
Steps:
  1. Activate the mana-producing creature by tapping it, adding at least {2}.
  2. Activate Yenna by paying {2} and tapping it, creating a token copy of Instill Energy attached to the mana-producing creature, then untapping Yenna and causing you to scry 2.
  3. Activate the Instill Energy token by paying {0}, untapping the mana-producing creature.
  4. Activate Auratog by sacrificing the Instill Energy token, causing Auratog to get +2/+2 until end of turn.
  5. Repeat.[END OF COMBO STEPS]

Result:
  - Infinitely large Auratog until end of turn
  - Infinite scry 2[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - You control a creature that can tap to produce at least {2}.
  -  Yenna does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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