Retreat to Coralhelm
Trench Behemoth
Llanowar Scout

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield (Llanowar Scout without summoning sickness on the battlefield).
You control a land.

   Steps

How does this combo work?
1
Activate Trench Behemoth by returning a land from the battlefield to your hand, untapping Trench Behemoth.
2
Activate Llanowar Scout by tapping it, putting the land from your hand onto the battlefield.
3
When the land enters the battlefield, Retreat to Coralhelm triggers, untapping Llanowar Scout.
4
If the land enters untapped and can produce mana, you may activate it by tapping it, adding at least 1.
5
Repeat.

   Results

What do I get from this combo?
Infinite landfall triggers
Infinite mana lands you control that enter the battlefield untapped can produce
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