Infinite blue mana, Infinite landfall triggers, Cast all spells in your library, Exile your library
Activate Urza by tapping Scaretiller, adding .
Scaretiller triggers, returning Gateway Plaza from your graveyard to the battlefield tapped.
Gateway Plaza enters the battlefield, triggering itself and Retreat to Coralhelm.
Resolve the Gateway Plaza trigger, choosing to sacrifice it.
Resolve the Retreat to Coralhelm trigger, untapping Scaretiller.
Repeat.
Component Cards
How It Works
Activate Urza by tapping Scaretiller, adding .
Scaretiller triggers, returning Gateway Plaza from your graveyard to the battlefield tapped.
Gateway Plaza enters the battlefield, triggering itself and Retreat to Coralhelm.
Resolve the Gateway Plaza trigger, choosing to sacrifice it.
Resolve the Retreat to Coralhelm trigger, untapping Scaretiller.
Repeat.