Cast Corpse Dance with buyback by tapping Caetus, Vampire Hexmage and two other creatures you control.
Displacer Kitten triggers, blinking Caetus and causing it to return to the battlefield as Invasion of Segovia.
When Invasion of Segovia enters the battlefield, it triggers, creating two 1/1 Kraken creature tokens.
Activate Vampire Hexmage by sacrificing it, removing all counters from Invasion of Segovia.
Invasion of Segovia triggers, causing you to exile it and cast it as Caetus, Sea Tyrant of Segovia.
Resolve Corpse Dance, returning Vampire Hexmage from your graveyard to the battlefield and returning Corpse Dance to your hand.
Repeat.
This intricate loop transforms a single cast of Corpse Dance into an infinite engine by leveraging Invasion of Segovia's front face to grant your noncreature spells convoke—effectively letting your creatures pay for the spell and its buyback cost. As you cast Corpse Dance, Displacer Kitten triggers to blink Caetus, Sea Tyrant of Segovia, resetting it back to its siege side to generate fresh Kraken tokens and provide a steady supply of creatures to tap. Meanwhile, sacrificing Vampire Hexmage immediately strips the defense counters off the invasion, instantly flipping it back into Caetus while simultaneously sending the Hexmage to the graveyard where Corpse Dance can retrieve it. Baral, Chief of Compliance sits quietly on the board shaving mana off your instant and sorcery spells to make the loop even more efficient, ensuring every piece works in harmony to flood the battlefield and generate infinite triggers.