How it works
Prerequisites
- You are able to play a land this turn.
Steps
- 1Play Dimir Aqueduct.
- 2When Dimir Aqueduct enters the battlefield, it and Retreat to Coralhelm trigger.
- 3Resolve the Dimir Aqueduct trigger, returning it from the battlefield to your hand.
- 4Holding priority, activate Penance by putting Dimir Aqueduct from your hand onto the top of your library.
- 5Resolve the Retreat to Coralhelm trigger, causing you to scry 1, ensuring to leave Dimir Aqueduct on top of your library.
- 6Galadriel triggers, putting Dimir Aqueduct from the top of your library onto the battlefield tapped.
- 7Repeat from step 2.
Commander brackets
In which brackets is this combo allowed, per Spellbook's Exhibition tier?