Glacial Chasm + Azusa, Lost but Seeking + Conduit of Worlds

Glacial Chasm

Azusa, Lost but Seeking

Conduit of Worlds

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 elegant land-lock locks opponents out of ever dealing damage to you by continuously resetting a single, brutal piece. With Azusa, Lost but Seeking granting the extra land drops necessary to keep up with the loop, you can play Glacial Chasm every turn either from your hand or straight from your graveyard using Conduit of Worlds. Whenever Glacial Chasm enters the battlefield, you simply sacrifice a land to its own trigger, and when its cumulative upkeep rolls around on your next turn, you gracefully let it die—only to replay it immediately and start the cycle anew, keeping you completely immune to damage without ever having to pay its escalating life cost.