Tideforce Elemental + Trench Behemoth + Walking Atlas

Tideforce Elemental

Trench Behemoth

Walking Atlas

How it works

1. Activate a land by tapping it, adding at least .
2. Activate Tideforce Elemental by paying and tapping it, untapping Walking Atlas.
3. Activate Trench Behemoth by returning the land from the battlefield to your hand, untapping it.
4. Activate Walking Atlas by tapping it, putting the land from your hand to the battlefield.
5. When the land enters the battlefield, Tideforce Elemental triggers, untapping it.
6. Repeat.