Devoted Druid + Leyline of Abundance + Branching Evolution + Shang-Chi, Martial Mentor

Devoted Druid

Leyline of Abundance

Branching Evolution

Shang-Chi, Martial Mentor

How it works

1. Activate Leyline of Abundance by paying 6, putting four +1/+1 counters on each creature you control due to Shang-Chi and Branching Evolution.
2. Activate Devoted Druid's first ability by tapping it, adding .
3. Leyline of Abundance triggers, adding .
4. Activate Devoted Druid's second ability by putting a -1/-1 counter on it, untapping Devoted Druid.
5. Repeat from step 2 three additional times.
6. Repeat from step 1.

This brilliant sequence hinges on Devoted Druid generating two green mana per tap thanks to the mana-doubling static ability of Leyline of Abundance, which more than covers the cost of untapping itself with a -1/-1 counter. By periodically pumping massive piles of +1/+1 counters onto your board, you cancel out those accumulated -1/-1 counters while exponentially amplifying the growth using the replacement effects of both Branching Evolution and Shang-Chi, Martial Mentor. The result is a compounding loop that leaves your entire team infinitely large and ready to overwhelm the table.