Goblin Welder + Retreat to Coralhelm + Seat of the Synod + 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 Seat of the Synod from your graveyard to the battlefield.
2. 2Seat of the Synod enters the battlefield, triggering Retreat to Coralhelm, untapping Goblin Welder.
3. 3Activate Seat of the Synod by tapping it, adding .
4. 4Activate Goblin Welder by tapping it, causing you to sacrifice Seat of the Synod 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 blue mana
• Infinite landfall triggers
• Infinite red mana