Retreat to Coralhelm, Guildless Commons, and Scaled Herbalist

Prerequisites

• Retreat to Coralhelm on the battlefield
• Guildless Commons in hand
• Scaled Herbalist on the battlefield

Steps

1. Activate Scaled Herbalist by tapping it, putting Guildless Commons from your hand onto the battlefield
2. When Guildless Commons enters the battlefield, it and Retreat to Coralhelm trigger
3. Resolve the Guildless Commons trigger, returning itself from the battlefield to your hand
4. Resolve the Retreat to Coralhelm trigger, untapping Scaled Herbalist
5. Repeat

Results

• Infinite landfall triggers