Retreat to Coralhelm + Llanowar Scout + Dimir Aqueduct
Retreat to Coralhelm
Dimir Aqueduct in hand. All other permanents on the battlefield. Llanowar Scout does not have summoning sickness.
- Activate Llanowar Scout by tapping it, putting Dimir Aqueduct from your hand onto the battlefield
- Dimir Aqueduct enters the battlefield, triggering itself and Retreat to Coralhelm
- Resolve the Dimir Aqueduct trigger, returning itself from the battlefield to your hand
- Resolve the Retreat to Coralhelm trigger, untapping Llanowar Scout
Infinite landfall triggers.