Devoted Druid without summoning sickness and with five or more +1/+1 counters on it).
Easy Prerequisites
You control five or more Forests.
Fertilid has two or more +1/+1 counters on it.
Mana Needed
available.
Steps
Activate
Fertilid by paying and removing a +1/+1 counter from it, causing you to search your library for a basic Forest and put it onto the battlefield tapped.
When the Forest enters,
Bristly Bill and
Roiling Canopy trigger.
Resolve the
Bristly Bill trigger, putting a +1/+1 counter on
Fertilid.
Resolve the
Roiling Canopy trigger, giving
Devoted Druid +3/+3 until end of turn.
Activate
Devoted Druid's first ability by tapping it, adding .
Activate
Devoted Druid's second ability by putting a -1/-1 counter on it, untapping it.
Repeat steps 5 and 6 once.
Repeat from step 1.
Activate
Bristly Bill by paying , doubling the number of +1/+1 counters on each creature you control.
Activate
Devoted Druid's first ability by tapping it, adding .
Activate
Devoted Druid's second ability by putting a -1/-1 counter on it, untapping it.
Repeat from step 2 four additional times.
Repeat from step 1.
Notes
Each loop,
Devoted Druid will net +1/+1. This can let you gain more , and that can then fetch non-Forest basic lands with
Fertilid.
If
Devoted Druid has six or more +1/+1 counters when you begin the combo, it will also get infinite +1/+1 counters which can be removed for infinite green mana.
Results
Infinite +1/+1 counters on certain creatures.
Infinite green mana.
Put all basic Forests from your library onto the battlefield tapped.
Metadata
Bracket tag
ExhibitionBracket 1+
For any deck
1
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5
1 · Exhibition5 · cEDH
Bracket tags are estimated from the cards and results of each combo, as a guideline rather than a strict classification.