A Blood Oath, a Blackfyre and a Dragonhorn (Spoilers Extended)

The other day while discussing some Upcoming Betrayals with u/RockyRockington I mentioned a theory I had read awhile back about how Victarion could possibly supply fAegon with a dragon. I have not been able to find the theory sadly (feel free to link and claim credit if its yours), but I am going to attempt to rehash what I remember.

Using the Dragonhorn, Victarion is going to gain access to Viserion, who will ultimately end up as fAegon's for the Dance of the Dragons II

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For this post to make sense I think we need to operate under two assumptions:

1. That fAegon is a Blackfyre

2. That the Dance of the Dragons II is going to be a literal dance between two Targaryen claimants

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The Greyjoys owe Bittersteel/the GC a blood oath/debt

A full account of their reigns can be found in Archmaester Haereg's History of the Ironborn. Therein you may read of Dagon Greyjoy, the Last Reaver, whose longships harried the western coasts when Aerys I Targaryen sat the Iron Throne. Of Alton Greyjoy, the Holy Fool, who sought new lands to conquer beyond the Lonely Light. Of Torwyn Greyjoy, who swore a blood oath with Bittersteel, then betrayed him to his enemies. Of Loron Greyjoy, the Bard, and his great and tragic friendship with young Desmond Mallister, a knight of the green lands. -TWOIAF, The Iron Islands: The Old Way and the New

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Obviously there are a ton of moving parts (Moqorro, Dusky Woman, etc.) but the general theory had two options:

After using the dragonhorn to claim Viserion, Victarion chooses either:

• Remain in Slaver's Bay and wait for Dany

or

• Return to Westeros

Either way his death is near and it results in fAegon getting Viserion.

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We know a Dance of the Dragons 2.0 will happen and (at least to me) it can't be a true "dance" unless both sides have dragons:

It was then that pasty, pudgy Teora raised her eyes from the creamcakes on her plate. "It is dragons."

"Dragons?" said her mother. "Teora, don't be mad."

"I'm not. They're coming."

"How could you possibly know that?" her sister asked, with a note of scorn in her voice. "One of your little dreams?"

Teora gave a tiny nod, chin trembling. "They were dancing. In my dream. And everywhere the dragons danced the people died." -TWOW, Arianne I

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If interested, please feel free to expand on this as this is really all I remember. There are numerous quotes in TWOW preview chapters that seem to allude to something happening with Viserion.

TLDR: At one point I read/discussed a theory with someone that had fAegon getting his dragon from Victarion. I don't necessarily believe it, but its definitely an interesting and somewhat plausible thought.