At least half of the basic lands in your library are Forests.
Mana Needed
available.
Steps
Play a land.
When the land enters,
Springheart Nantuko triggers, causing you to pay to create a token copy of
Springbloom Druid.
When the
Springbloom Druid token enters, it triggers, causing you to sacrifice a land, then search your library for a basic Forest and another basic land and put them onto the battlefield untapped due to
Spelunking.
When the basic lands enter,
Springheart Nantuko triggers twice.
Holding priority, activate both lands by tapping them, adding .
Resolve the first
Springheart Nantuko trigger, choosing not to pay and creating a 1/1 Insect creature token.
Resolve the second
Springheart Nantuko trigger, causing you to pay to create a token copy of
Springbloom Druid.
Repeat from step 3 until your library contains no basic lands.
Notes
You can perform this combo if half the basic lands in your library aren't Forests, but you won't be able to grab all basic lands unless you supplement to compensate. While you will put all basic lands onto the battlefield, you'll have to sacrifice half of them to continue the combo. This won't affect how many landfall triggers, ETB triggers and creature tokens you get however.
Results
Near-infinite creature ETB.
Near-infinite creature tokens.
Near-infinite landfall triggers.
Put all basic lands from your library onto the battlefield tapped.
Metadata
Bracket tag
ExhibitionBracket 1+
For any deck
1
2
3
4
5
1 · Exhibition5 · cEDH
Bracket tags are estimated from the cards and results of each combo, as a guideline rather than a strict classification.