Nim Deathmantle, Llanowar Druid, and Concordant Crossroads

Prerequisites

• Nim Deathmantle on the battlefield
• Llanowar Druid on the battlefield
• Concordant Crossroads on the battlefield
• You control at least five Forests

Steps

1. Activate five Forests by tapping them, adding
2. Activate Llanowar Druid by tapping and sacrificing it
3. Llanowar Druid dies, triggering Nim Deathmantle, causing you to pay to return Llanowar Druid from your graveyard to the battlefield, and attach Nim Deathmantle to it
4. Resolve the Llanowar Druid ability from step 2, untapping all Forests
5. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite green mana
• Infinite LTB
• Infinite sacrifice triggers
• Infinite untap of all Forests