Glacial Chasm, Druid Class, and Ramunap Excavator

Prerequisites

• Glacial Chasm on the battlefield
• Druid Class on the battlefield
• Ramunap Excavator on the battlefield
• Druid Class is at least level 2

Steps

1. Play Glacial Chasm either from your hand or from your graveyard
2. When Glacial Chasm enters the battlefield, it triggers Druid Class and its own second ability
3. Resolve the Druid Class trigger, gaining 1 life
4. Resolve the Glacial Chasm trigger, causing you to sacrifice another land you control
5. Play any land from your graveyard
6. When the land enters the battlefield, Druid Class triggers, causing you to gain 1 life
7. At the beginning of your next upkeep, Glacial Chasm's cumulative upkeep ability triggers, allowing you to choose not to pay the cost and sacrifice it instead
8. Repeat

Results

• Prevent all damage that would be dealt to you