Cast Corpse Dance with buyback by tapping Caetus, Vampire Hexmage and two other creatures you control.
Displacer Kitten and Jace's Sanctum triggers.
Resolve the Jace's Sanctum trigger, causing you to scry 1.
Resolve the Displacer Kitten trigger, 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.

Infinite ETB

Infinite LTB

Infinite magecraft triggers

Infinite scry 1

Infinite storm count

Infinite tapped creature tokens

Invasion of Segovia // Caetus, Sea Tyrant of Segovia

Displacer Kitten

Vampire Hexmage

Corpse Dance

Jace's Sanctum

Cast Déjà Vu by paying {1}{U}, targeting Call to Mind.
Storm-Kiln Artist and Jace's Sanctum trigger.
Resolve the Jace's Sanctum trigger, causing you to scry 1.
Resolve the Storm-Kiln Artist trigger, 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 {U}{U}.
Cast Call to Mind by paying {1}{U}, targeting Déjà Vu.
Storm-Kiln Artist and Jace's Sanctum trigger.
Resolve the Jace's Sanctum trigger, causing you to scry 1.
Resolve the Storm-Kiln Artist trigger, creating a Treasure token.
Activate the Treasure token by tapping and sacrificing it, adding {U}{U}.
Repeat.

Storm-Kiln Artist

Goldspan Dragon

Call to Mind

Déjà Vu

Combos with "Jace's Sanctum"