Patron of the Moon, Wonderscape Sage, Retreat to Coralhelm, and Archelos, Lagoon Mystic

Prerequisites

• Patron of the Moon on the battlefield
• Wonderscape Sage on the battlefield
• Retreat to Coralhelm on the battlefield
• Archelos, Lagoon Mystic on the battlefield
• Wonderscape Sage does not have summoning sickness
• You control at least one mana-producing land

Steps

1. Activate the mana-producing land by tapping it, adding at least
2. Activate Wonderscape Sage by tapping it and returning the mana-producing land from the battlefield to your hand, causing you to draw a card and discard a card if the land didn't have a nonbasic land type
3. Activate Patron of the Moon by paying , putting the mana-producing land from your hand onto the battlefield untapped due to Archelos
4. When the land enters the battlefield, Retreat to Coralhelm triggers, untapping Wonderscape Sage
5. Repeat

Results

• Infinite card draw
• Infinite self-discard triggers
• Infinite draw triggers
• Infinite looting
• Near-infinite landfall triggers