Glacial Chasm + The Gitrog Monster + Perennial Behemoth

Prerequisites

• You control another land.

Steps

1. 1Play Glacial Chasm either from your hand or from your graveyard.
2. 2When Glacial Chasm enters the battlefield, its second ability triggers, causing you to sacrifice another land you control.
3. 3Play any land from your graveyard.
4. 4At the beginning of your next upkeep, Glacial Chasm's cumulative upkeep ability and The Gitrog Monster's first ability trigger.
5. 5Resolve The Gitrog Monster trigger, sacrificing Glacial Chasm.
6. 6Resolve the Glacial Chasm trigger, choosing not to pay and doing nothing as Glacial Chasm is no longer on the battlefield.
7. 7Repeat.

Effects

• Lock
• Prevent all damage that would be dealt to you