Glacial Chasm + Crucible of Worlds + Wayward Swordtooth

Glacial Chasm

Crucible of Worlds

Wayward Swordtooth

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.

This ingenious lock completely shields you from all damage by resetting Glacial Chasm before its mounting cumulative upkeep cost becomes unmanageable. When the Chasm forces you to sacrifice a land upon entry, Crucible of Worlds steps in to let you simply replay that land straight from your graveyard. Meanwhile, Wayward Swordtooth grants you the crucial extra land drop needed each turn to keep the cycle flowing smoothly, bypassing its own inability to attack or block while maintaining an impenetrable defensive shell.