Fertilid, Devoted Druid, Roiling Canopy, and Bristly Bill, Spine Sower

Prerequisites

• Fertilid on the battlefield
• Devoted Druid on the battlefield
• Roiling Canopy on the battlefield
• Bristly Bill, Spine Sower on the battlefield
• available

Steps

1. 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
2. When the Forest enters, Bristly Bill and Roiling Canopy trigger
3. Resolve the Bristly Bill trigger, putting a +1/+1 counter on Fertilid
4. Resolve the Roiling Canopy trigger, giving Devoted Druid +3/+3 until end of turn
5. Activate Devoted Druid's first ability by tapping it, adding
6. Activate Devoted Druid's second ability by putting a -1/-1 counter on it, untapping it
7. Repeat steps 5 and 6 once
8. Repeat from step 1
9. Activate Bristly Bill by paying , doubling the number of +1/+1 counters on each creature you control
10. Activate Devoted Druid's first ability by tapping it, adding
11. Activate Devoted Druid's second ability by putting a -1/-1 counter on it, untapping it
12. Repeat from step 2 four additional times
13. Repeat from step 1

Results

• Infinite +1/+1 counters on certain creatures
• Infinite green mana
• Put all basic Forests from your library onto the battlefield tapped