How can you create a combo with Brinelin, the Moon Kraken, Gwenna, Eyes of Gaea, Earthquake Dragon, Sailors' Bane?
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[START OF COMBO]This combo can be formed with Brinelin, the Moon Kraken, Gwenna, Eyes of Gaea, Earthquake Dragon, Sailors' Bane

Color identity: GU
Mana cost: 
Steps:
  1. Activate Gwenna by tapping it, adding {U}{U} that can only be spent to cast creature spells or to activate abilities of creatures.
  2. Cast Sailors' Bane by paying {U}{U}.
  3. Brinelin and Gwenna trigger.
  4. Resolve the Brinelin trigger, returning Earthquake Dragon from the battlefield to your hand.
  5. Resolve the Gwenna trigger, putting a +1/+1 counter on it and untapping it.
  6. Activate Gwenna by tapping it, adding {G} and one mana of any color that can only be spent to cast creature spells or to activate abilities of creatures.
  7. Cast Earthquake Dragon by paying {G}.
  8. Brinelin and Gwenna trigger.
  9. Resolve the Brinelin trigger, returning Sailors' Bane from the battlefield to your hand.
  10. Resolve the Gwenna trigger, putting a +1/+1 counter on it and untapping it.
  11. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite +1/+1 counters on Gwenna
  - Infinite colored mana that can only be spent to activate abilities of creatures
  - Infinite colored mana that can only be spent to cast creature spells
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Brinelin, the Moon Kraken must be on the battlefield
  - Gwenna, Eyes of Gaea must be on the battlefield
  - Earthquake Dragon must be on the battlefield
  - Sailors' Bane must be in your hand
  - Gwenna does not have summoning sickness.
  - You have at least seven cards in your graveyard and/or exile that's an instant or sorcery, or that has an Adeventure.
  - Dragons you control have a total mana value of five or greater.
[END OF COMBO PREREQUISITES]
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