Goblin Welder + Retreat to Coralhelm + Ancient Den + Great Furnace

Prerequisites

• Goblin Welder does not have summoning sickness.

Steps

1. 1Activate Goblin Welder by tapping it, causing you to sacrifice Great Furnace and return Ancient Den from your graveyard to the battlefield.
2. 2Ancient Den enters the battlefield, triggering Retreat to Coralhelm, untapping Goblin Welder.
3. 3Activate Ancient Den by tapping it, adding .
4. 4Activate Goblin Welder by tapping it, causing you to sacrifice Ancient Den and return Great Furnace from your graveyard to the battlefield.
5. 5Great Furnace enters the battlefield, triggering Retreat to Coralhelm, untapping Goblin Welder.
6. 6Activate Great Furnace by tapping it, adding .
7. 7Repeat.

Effects

• Infinite landfall triggers
• Infinite red mana
• Infinite white mana