Glacial Chasm + Ramunap Excavator + Case of the Locked Hothouse

Glacial Chasm

Ramunap Excavator

Case of the Locked Hothouse

How it works

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. Play any land from your graveyard.
4. 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.
5. Repeat.

By letting Glacial Chasm sacrifice itself to its own cumulative upkeep before its life payment becomes unmanageable, you completely bypass its downside while keeping yourself entirely immune to all damage. Meanwhile, Ramunap Excavator acts as your engine, letting you pull that very same Glacial Chasm right back out of your graveyard and play it over and over again. Case of the Locked Hothouse bridges the gap by granting you an additional land play on each turn, ensuring you have the extra capacity to keep deploying lands sacrificed to Glacial Chasm's entry trigger while simultaneously using its solved ability to play additional lands directly off the top of your library.