Curse of Marit Lage + Stormtide Leviathan

UR identity

Commander legal

The 2 combo pieces

• Curse of Marit Lage
• Stormtide Leviathan

How to execute it

1. Stormtide Leviathan causes all lands to be Islands in addition to their other types.
2. Curse of Marit Lage prevents Islands from untapping during their controller's untap steps.

What the combo produces

• Lands do not untap
• Lock
• Mass Land Denial