Scaretiller + Retreat to Coralhelm + Gateway Plaza + Urza, Lord High Artificer

Prerequisites

—

Steps

1. 1Activate Urza by tapping Scaretiller, adding .
2. 2Scaretiller triggers, returning Gateway Plaza from your graveyard to the battlefield tapped.
3. 3Gateway Plaza enters the battlefield, triggering itself and Retreat to Coralhelm.
4. 4Resolve the Gateway Plaza trigger, choosing to sacrifice it.
5. 5Resolve the Retreat to Coralhelm trigger, untapping Scaretiller.
6. 6Repeat.

Effects

• Cast all spells in your library
• Exile your library
• Infinite blue mana
• Infinite landfall triggers