Obviously the above decklist is outdated, but the principles of the deck (eight accelerants, the most efficient threats in green and white, and playing four Gavony Townships to mitigate mana flooding) are ones that play favorably with Ajani, Caller of Pride
The other question is does Palkia Ex have what it takes to dethrone Gyarados
Auron Set Number 8 Language Espaol Legal Formats Alchemy, Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Standard, Timeless, Vintage Rulings (6/6/2025) "Flashback [cost]" means "You may cast this card from your graveyard if the resulting spell is an instant or sorcery spell by paying [cost] rather than paying its mana cost" and "If the flashback cost was paid, exile this card instead of putting it anywhere else any time it would leave the stack." (6/6/2025) You must still follow any timing restrictions and permissions, including those based on the card's type
Rather, a second "reflexive" ability triggers when you sacrifice The Falcon this way