Glacial Chasm + Conduit of Worlds + Storm Cauldron

Glacial Chasm

Conduit of Worlds

Storm Cauldron

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 lock relies on constantly cycling Glacial Chasm in and out of play to keep you entirely safe from damage while completely bypassing its cumulative upkeep. Because Glacial Chasm forces you to sacrifice a land when it enters the battlefield, Storm Cauldron steps in to make sure you always have a steady supply of lands in your graveyard to feed the cycle. With Conduit of Worlds allowing you to continuously play those lands right back out of your graveyard on subsequent turns, you can effortlessly replay a fresh Glacial Chasm every turn—sacrificing the old one to its own cumulative upkeep before it demands too much life, and letting Storm Cauldron bounce your other lands safely back to your hand for the next iteration.