Tideforce Elemental, Oboro Breezecaller, Walking Atlas, and High Tide

Prerequisites

• Tideforce Elemental on the battlefield
• Oboro Breezecaller on the battlefield
• Walking Atlas on the battlefield
• High Tide in hand
• Tideforce Elemental and Walking Atlas do not have summoning sickness
• You control at least two Islands that enters the battlefield untapped
• available

Steps

1. Cast High Tide by paying
2. Activate two Islands by tapping them, adding
3. Activate Oboro Breezecaller by paying and returning a tapped Island to your hand, untapping another Island
4. Activate Walking Atlas by tapping it, putting an Island from your hand onto the battlefield
5. Whenever the Island enters the battlefield, Tideforce Elemental triggers
6. Holding priority, activate Tideforce Elemental by paying and tapping it, untap Walking Atlas
7. Resolve the Tideforce Elemental trigger, untapping itself
8. Repeat from step 2

Results

• Infinite blue mana
• Infinite landfall triggers