Ashaya, Soul of the Wild + Darksteel Garrison + Devoted Druid

Prerequisites

• Devoted Druid does not have summoning sickness.
• Darksteel Garrison attached to Devoted Druid.

Steps

1. 1Activate Devoted Druid by tapping it, adding .
2. 2Darksteel Garrison triggers, giving Devoted Druid +1/+1 until end of turn.
3. 3Activate Devoted Druid's second ability by putting a -1/-1 counter on it, untapping it.
4. 4Repeat.

Effects

• Infinite -1/-1 counters on a permanent
• Infinite green mana