Fertilid, Amulet of Vigor, Felidar Retreat, and Nyxbloom Ancient

Prerequisites

• Fertilid on the battlefield
• Amulet of Vigor on the battlefield
• Felidar Retreat on the battlefield
• Nyxbloom Ancient on the battlefield
• Fertilid has at least two +1/+1 counters on it
• available

Steps

1. Activate Fertilid, searching your library for a basic Forest card, putting it onto the battlefield tapped
2. Amulet of Vigor triggers, untapping the land
3. Felidar Retreat triggers
4. Resolve the Felidar Retreat trigger putting a +1/+1 counter on each creature you control
5. Tap the land for
6. Repeat

Results

• Near-infinite +1/+1 counters on creatures you control
• Near-infinite colored mana
• Near-infinite landfall triggers
• Put all basic lands from your library onto the battlefield