Devoted Druid + Leyline of Abundance + Doubling Season + High Score

Devoted Druid

Leyline of Abundance

Doubling Season

High Score

How it works

1. Activate Leyline of Abundance by paying 6, putting four +1/+1 counters on each creature you control due to Doubling Season and High Score.
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 clever engine turns Devoted Druid into a self-sustaining mana-and-counter generator by exploiting replacement effects to outpace its own drawback. When you tap Devoted Druid for mana, Leyline of Abundance doubles your green production to fund the heavy activation cost of Leyline's own counter-placing ability. Meanwhile, Doubling Season and High Score stack to multiply every counter placed on your creatures, ensuring that the initial investment completely erases the -1/-1 counters on Devoted Druid while growing your board infinitely.