Zask, Skittering Swarmlord, Glacial Chasm, and Zuran Orb

Prerequisites

• Zask, Skittering Swarmlord on the battlefield
• Glacial Chasm in hand or in the graveyard
• Zuran Orb on the battlefield
• You control at least one additional land
• Your life total is at least three

Steps

1. Play Glacial Chasm either from your hand or from your graveyard
2. When Glacial Chasm enters the battlefield, its second ability triggers, causing you to sacrifice another land you control
3. Pass the turn
4. At the beginning of your next upkeep, Glacial Chasm's cumulative upkeep ability triggers, causing you to put an age counter on it and lose 2 life
5. Play any land from your graveyard
6. Pass the turn
7. At the beginning of your next upkeep, Glacial Chasm's cumulative upkeep ability triggers
8. Holding priority, activate Zuran Orb by sacrificing Glacial Chasm, causing you to gain two life
9. Resolve the Glacial Chasm trigger, doing nothing
10. Repeat

Results

• Prevent all damage that would be dealt to you