Goblin Welder
Retreat to Coralhelm
Ancient Den
Great Furnace

   Prerequisites

What do I need to start this combo?
Ancient Den in your graveyard.
All other permanents on the battlefield.
Goblin Welder does not have summoning sickness.

   Steps

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

   Results

What do I get from this combo?
Infinite landfall triggers
Infinite red mana
Infinite white mana
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