Cast Déjà Vu by paying , targeting Call to Mind.
Storm-Kiln Artist triggers, creating a Treasure token.
Resolve Déjà Vu, returning Call to Mind from your graveyard to your hand.
Activate the Treasure token by tapping and sacrificing it, adding .
Cast Call to Mind by paying , targeting Déjà Vu.
Storm-Kiln Artist triggers, creating a Treasure token.
Resolve Call to Mind, returning Déjà Vu from your graveyard to your hand.
Activate the Treasure token by tapping and sacrificing it, adding .
Repeat.

Sea Tyrant of Segovia.

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.