Activate all mana-producing lands you control by tapping them, adding at least {10}{R}{G}{W}{W}.
Cast Zacama either from your hand or from the command zone by paying {6}{R}{G}{W} plus commander tax, if applicable.
When Zacama enters the battlefield, it triggers, untapping all lands you control.
Cast Stormfront Riders by paying {4}{W}.
When Stormfront Riders enters the battlefield, its first ability triggers, returning it and Zacama from the battlefield to your hand.
Stormfront Riders' second ability triggers twice, creating two 1/1 Soldier creature tokens.
Repeat.
If lands you control can tap to produce at least {11}{R}{G}{W}{W}, this combo nets infinite mana, and you may use that mana to activate Zacama's other abilities.

Infinite creature tokens

Infinite creature ETB

Infinite lifegain

Infinite lifegain triggers

Infinite creature LTB

Infinite mana lands you control can produce

Infinite storm count

Zacama, Primal Calamity

Stormfront Riders

If you control two untapped creatures that share a creature type with Stormfront Riders, activate Cryptic Gateway by tapping the two creatures, putting Stormfront Riders from your hand onto the battlefield.
Otherwise, cast Stormfront Riders by paying {4}{W}.
Stormfront Riders enters the battlefield, returning itself and any other creature you control from the battlefield to your hand.
Stormfront Riders triggers twice, creating two 1/1 Soldier creature tokens.
Activate Cryptic Gateway by tapping the two Soldier tokens, putting Stormfront Riders from your hand onto the battlefield.
Stormfront Riders enters the battlefield, returning itself and a Soldier token from the battlefield to your hand.
Repeat from step 4.

Infinite tapped creature tokens

Cryptic Gateway

Activate Sneak Attack by paying {R}, putting Priest of Urabrask from your hand onto the battlefield.
Priest of Urabrask enters the battlefield, adding {R}{R}{R}.
Activate Sneak Attack by paying {R}, putting Stormfront Riders from your hand onto the battlefield.
Stormfront Riders enters the battlefield, triggering its first ability, returning itself and Priest of Urabrask from the battlefield to your hand.
Stormfront Riders' second ability triggers twice, creating two 1/1 Soldier creature tokens.
Repeat.

Infinite red mana

Sneak Attack

Priest of Urabrask

Activate Sneak Attack by paying {R}, putting Stormfront Riders from your hand onto the battlefield.
When Stormfront Riders enters the battlefield, its first ability triggers, returning it and any other creature you control except Thermopod from the battlefield to your hand.
Stormfront Riders' second ability triggers twice, creating two 1/1 Soldier creature tokens.
Activate Thermopod's second ability by sacrificing a Soldier, adding {R}.
Repeat.

Infinite death triggers

Infinite creature sacrifice triggers

Thermopod

Activate Sneak Attack by paying {R}, putting Stormfront Riders from your hand onto the battlefield.
When Stormfront Riders enters the battlefield, its first ability triggers, returning it and any other creature you control from the battlefield to your hand.
Stormfront Riders' second ability triggers twice, creating two 1/1 Soldier creature tokens.
Activate Phyrexian Altar by sacrificing a Soldier, adding {R}.
Repeat.

Phyrexian Altar

Activate Sneak Attack by paying {R}, putting Ardent Electromancer from your hand onto the battlefield.
When Ardent Electromancer enters the battlefield, it triggers, adding at least {R}{R}.
Activate Sneak Attack by paying {R}, putting Stormfront Riders from your hand onto the battlefield.
When Stormfront Riders enters the battlefield, its first ability triggers, returning it and Ardent Electromancer from the battlefield to your hand.
Stormfront Riders' second ability triggers twice, creating two 1/1 Soldier creature tokens.
Repeat.
If you control at least three creatures in your party when Ardent Electromancer enters the battlefield, this combo nets infinite {R}.

Ardent Electromancer

Cast Stormfront Riders by paying {4}{W/P} due to Defiler of Faith.
Defiler of Faith triggers, creating a 1/1 Soldier creature token.
When the Soldier enters, Mana Echoes and Liliana the Faultless triggers.
Resolve the Mana Echoes trigger, adding {C} for each Soldier you control.
Resolve the Liliana the Faultless trigger, causing you to gain 1 life.
Resolve the Stormfront Riders spell. When it enters, it, Mana Echoes and Liliana the Faultless trigger.
Resolve the Liliana the Faultless trigger, causing you to gain 1 life.
Resolve the Stormfront Riders trigger, returning it and the Soldier token created in step 2 from the battlefield to your hand.
Stormfront Riders' second ability triggers twice.
Resolve a Stormfront Riders trigger, creating a 1/1 Soldier creature token.
Repeat steps 3 through 5 one additional time.
Repeat from step 10 for the remaining trigger.
Resolve the Mana Echoes trigger from step 6, adding {C} for each Soldier you control.
Repeat.

Combos with "Stormfront Riders"