Activate any creature you control that does not have summoning sickness by tapping it, adding {R} that can only be spent to cast an instant or sorcery spell, or to gain a Class level.
Repeat step 1 until you control no untapped creatures without summoning sickness, or until you have {3}{R} available, whichever comes first.
Cast Haze of Rage with buyback by paying {3}{R}.
Haze of Rage's storm ability triggers, each Stormsplitter you control triggers, and Sorcerer Class's third ability triggers if it is level 3.
Resolve the Stormsplitter triggers, creating that many token copies of Stormsplitter.
Resolve the Sorcerer Class trigger, if applicable, dealing damage to any target equal to the number of instant and/or sorcery spells you've cast this turn.
Resolve the Haze of Rage trigger, copying it for each spell you've cast before it this turn.
Resolve all Haze of Rages, causing creatures you control to get +1/+0 for each Haze of Rage, and returning the original Haze of Rage to your hand.
Repeat.

Infinite LTB

Infinite ETB

Infinite damage

Infinite storm count

Infinite creature tokens with haste

Infinite magecraft triggers

Infinite power for creatures you control until end of turn

Infinite blue mana that can only be spent to cast instant and/or sorcery spells

Infinite red mana that can only be spent to cast instant and/or sorcery spells

Stormsplitter

Sorcerer Class

Haze of Rage

Cast Haze of Rage with buyback by paying {2}, tapping Stormsplitter, and tapping Caetus.
Haze of Rage's Storm ability and each Stormsplitter triggers.
Resolve Haze of Rage's Storm ability, creating a copy of it for each spell cast before it this turn and resolving all those copies.
Resolve each Stormsplitter's trigger, creating a token copy of each one.
Haze of Rage resolves, giving creatures you control +1/+0 until end of turn and returning itself to your hand.
Cast Haze of Rage with buyback by paying {3} and tapping one token copy of Stormsplitter.
Repeat steps 2 through 5.
Cast Haze of Rage with buyback by paying {2} and tapping two token copies of Stormsplitter.
Repeat steps 2 through 5.
Cast Haze of Rage with buyback by tapping four token copies of Stormsplitter.
Repeat steps 2 through 5.
Repeat from step 10.

Invasion of Segovia // Caetus, Sea Tyrant of Segovia

Cast Sprout Swarm with buyback by paying {4}{G}, reduced by {1} for each creature you can tap as you cast it.
Each Stormsplitter you control triggers, creating that many token copies of Stormsplitter.
Resolve Sprout Swarm, creating a 1/1 Saproling creature token and returning Sprout Swarm to your hand.
Repeat.

Sprout Swarm

Csat Seething Anger with buyback by paying {3}{R}.
Each Stormsplitter you control triggers, creating that many token copies of Stormsplitter.
Resolve Seething Anger, giving target creature +3/+0 until end of turn, and returning Seething Anger to your hand.
If you control at least 8 Stormsplitters, activate Phyrexian Altar four times by sacrificing four Stormsplitter tokens, adding {3}{R}.
Repeat.
If you have an additional {3}{R} available and/or control additional Stormsplitter tokens, this combo will result in infinite Stormsplitter tokens and infinite colored mana.

Infinite colored mana

Infinite sacrifice triggers

Infinite death triggers

Phyrexian Altar

Seething Anger

Csat Seething Anger with buyback by paying {3}{R}.
Each Stormsplitter you control triggers, creating that many token copies of Stormsplitter.
Resolve Seething Anger, giving target creature +3/+0 and returning Seething Anger to your hand.
If you control at least eight Stormsplitters, activate Thermopod's second ability four times by sacrificing four Stormsplitter tokens, adding {R}{R}{R}{R}.
Repeat.

Infinite red mana

Thermopod

Combos with "Stormsplitter"