Marath, Will of the Wild, Devoted Druid, Hardened Scales, and Primal Vigor

Prerequisites

• Marath, Will of the Wild on the battlefield
• Devoted Druid on the battlefield
• Hardened Scales on the battlefield
• Primal Vigor on the battlefield
• Marath has at least two +1/+1 counters on it
• Devoted Druid does not have a -1/-1 counter on it
• available

Steps

1. Activate Devoted Druid's first ability by tapping it, adding
2. Activate Marath by paying and removing a +1/+1 counter from it, putting four +1/+1 counters on it
3. Activate Marath by paying and removing a +1/+1 counter from it, putting four +1/+1 counters on Devoted Druid
4. Activate Devoted Druid's second ability by putting a -1/-1 counter on it, untapping it
5. Activate Devoted Druid's first ability by tapping it, adding
6. Repeat from step 4 one additional time
7. Repeat from step 2
8. Once you have infinite +1/+1 counters on Devoted Druid and Marath, you may use them to get infinite green mana, Elemental creature tokens, and +1/+1 counters, and/or deal infinite damage to any target(s)

Results

• Infinite +1/+1 counters
• Infinite creature tokens
• Infinite damage
• Infinite ETB
• Infinite green mana