Tatyova, Benthic Druid, Mystic Sanctuary, Tidal Bore, and Walking Atlas

Prerequisites

• Tatyova, Benthic Druid on the battlefield
• Mystic Sanctuary on the battlefield
• Tidal Bore in hand
• Walking Atlas on the battlefield
• Walking Atlas does not have summoning sickness
• You control at least three other Islands

Steps

1. Cast Tidal Bore by returning Mystic Sanctuary from the battlefield to your hand, untapping Walking Atlas
2. Activate Walking Atlas by tapping it, putting Mystic Sanctuary from your hand onto the battlefield
3. Mystic Sanctuary enters the battlefield untapped, triggering itself and Tatyova
4. Resolve the Mystic Sanctuary trigger, returning Tidal Bore from your graveyard to the top of your library
5. Resolve the Tatyova trigger, causing you to gain 1 life and draw Tidal Bore from the top of your library
6. Activate Mystic Sanctuary by tapping it, adding
7. Repeat

Results

• Infinite blue mana
• Infinite draw triggers
• Infinite landfall triggers
• Infinite lifegain
• Infinite lifegain triggers
• Infinite magecraft triggers
• Infinite storm count