Devoted Druid + Leyline of Abundance + Innkeeper's Talent + Loading Zone

Devoted Druid

Leyline of Abundance

Innkeeper's Talent

Loading Zone

How it works

1. Activate Leyline of Abundance by paying 6, putting four +1/+1 counters on each creature you control due to Loading Zone and Innkeeper's Talent.
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 fascinating engine leverages Devoted Druid's self-untapping mechanic alongside Leyline of Abundance's mana-doubling trigger to generate infinite green mana. The real magic, however, comes from the explosive counter-doubling synergy between Innkeeper's Talent and Loading Zone: because both permanents double any counters placed on your creatures, a single activation of Leyline of Abundance's pump ability floods your board with quadruple the +1/+1 counters. This massive influx of positive counters easily counteracts the -1/-1 counters Devoted Druid uses to untap itself, keeping the druid alive and allowing the loop to scale infinitely.