Lightning Crafter, Molten Echoes, and Skirk Prospector

Prerequisites

• Lightning Crafter in hand
• Molten Echoes on the battlefield
• Skirk Prospector on the battlefield
• "Goblin" or "Shaman" chosen with Molten Echoes
• available

Steps

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

Results

• Infinite damage
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite red mana
• Infinite sacrifice triggers