Activate Kiki-Jiki by tapping it, creating a token copy of Lightning Crafter with haste.
The Lightning Crafter token enters the battlefield, championing Kiki-JIki.
Activate the Lightning Crafter token by tapping it, dealing 3 damage to any target.
Activate Skirk Prospector by sacrificing the Lightning Crafter token, adding {R}.
The Lightning Crafter token leaves the battlefield, returning Kiki-Jiki from exile to the battlefield.
Repeat.

Infinite damage

Infinite death triggers

Infinite creature ETB

Infinite creature LTB

Infinite red mana

Infinite creature sacrifice triggers

Kiki-Jiki, Mirror Breaker

Lightning Crafter

Skirk Prospector

Cast Lightning Crafter by paying {3}{R}.
When Lightning Crafter enters the battlefield, its champion ability triggers.
Holding priority, activate Kiki-Jiki by tapping it, creating a token copy of Lightning Crafter with haste.
When the token Lightning Crafter enters the battlefield, its champion ability triggers, exiling Kiki-Jiki.
Activate the token Lightning Crafter by tapping it, dealing 3 damage to any target.
Activate Goblin Bombardment by sacrificing the token Lightning Crafter.
When the token Lightning Crafter leaves the battlefield, it triggers, returning Kiki-Jiki from exile to the battlefield.
Resolve the Goblin Bombardment ability.
Repeat from step 3.

Goblin Bombardment

Cast Lightning Crafter by paying its mana cost.
When Lightning Crafter enters the battlefield, its champion ability and Molten Echoes triggers.
Resolve the Molten Echoes trigger, creating a token copy of Lightning Crafter with haste.
When the Lightning Crafter token enters the battlefiled, its champion ability triggers, exiling the nontoken Lightning Crafter until the token Lightning Crafter leaves the battlefield.
Holding priority, activate the Lightning Crafter token by tapping it, dealing 3 damage to any target.
Resolve the champion ability from step 2, exiling the token Lightning Crafter.
The token Lightning Crafter leaves the battlefield, returning the nontoken Lightning Crafter from exile to the battlefield.
Repeat from step 2.

Molten Echoes

Cast Lightning Crafter by paying {3}{R}.
When Lightning Crafter enters the battlefield, its champion ability triggers twice.
Holding priority, activate Kiki-Jiki by tapping it, creating a token copy of Lightning Crafter with haste.
When the Lightning Crafter token enters the battlefield, its champion ability triggers twice.
Holding priority, activate the Lightning Crafter token by tapping it, dealing 3 damage to any target.
Resolve the first champion trigger, exiling Kiki-Jiki.
Resolve the second champion trigger, exiling the Lightning Crafter token.
When the Lightning Crafter token leaves the battlefield, it triggers, returning Kiki-Jiki from exile to the battlefield.
Repeat from step 3.

Roaming Throne

Cast Lightning Crafter by paying {3}{R}.
Lightning Crafter enters the battlefield, triggering its champion ability and Molten Echoes.
Resolve the Molten Echoes trigger, creating a token copy of Lightning Crafter with haste.
The Lightning Crafter token enters the battlefield, championing the nontoken Lightning Crafter.
Resolve the Lightning Crafter trigger from step 2, choosing not to exile anything.
Activate the Lightning Crafter token by tapping it, dealing 3 damage to any target.
Activate Skirk Prospector by sacrificing the Lightning Crafter token, adding {R}.
The Lightning Crafter token leaves the battlefield, returning the nontoken LIghtning Crafter from exile to the battlefield.
Repeat from step 2.

Cast Lightning Crafter by paying {3}{R}.
Lightning Crafter enters the battlefield, triggering its champion ability and Molten Echoes.
Resolve the Molten Echoes trigger, creating a token copy of Lightning Crafter with haste.
The Lightning Crafter token enters the battlefield, championing the nontoken Lightning Crafter.
Resolve the Lightning Crafter trigger from step 2, choosing not to exile anything.
Activate the Lightning Crafter token by tapping it, dealing 3 damage to any target.
Activate Sling-Gang Lieutenant by sacrificing the Lightning Crafter token.
The Lightning Crafter token leaves the battlefield, returning the nontoken LIghtning Crafter from exile to the battlefield.
Repeat from step 2.
Resolve all Sling-Gang Lieutenant abilities, causing each opponent to lose infinite life and you to gain infinite life.

Combos with "Lightning Crafter"